Hi!

I was trying to obtain the field equations for the QED Lagrangian and I was not sucessfull.

All my calculations are equal to 0.

Can someone give a hand?

QED.mw

Thanks a lot.

hphphphphphphphphphphphphphphphphphhphphghpgmhfphmgflkhmgfklhmsfgmhfglkhmlfgkmhflgkmhklfgh

The program below coredumps once executed:

Engine mapleEngine = new Engine(new String[]{"java"}, new EngineCallBacksCustom(), null, null );

mapleEngine.evaluate("Groebner:-Basis(numer([lend2-lend2, lenh1-lenh1, trig7-lenh1/lenk1, degb1-degb1, degc1+degb1+degz1-180, degf1+degb1-degy1, degb1+degi1+degf1-180, degc1+degb1-degr1, degi1+degb1-degg1, degc2+degb1+dege1-180, degi2+dego1+degh2+degb1-360, lenl1-lenl1, lenb2/lenl1-lena2/lenn1, areat2-(1/2)*lenl1*lenh1, trig6-lenh1/lenj1, -lend1^2+lenh1^2+lenj1^2, lenb2/lenl1-lenl1/lend1, lend1+lend2-lenb2, lend1-lend1, lenl1/lend1-lena2/lenn1, trig2-lenj1/lend1, trig3-lenh1/lend1, trig4-lenh1/lend1, trig1-lenj1/lend1, areas2-(1/2)*lenh1*lenj1, lenj1+lenk1-lenl1, lenj1-lenj1, trig5-lenj1/lenh1, degb1+degi1-90, degz1-degm1-degi1, degi2-degx1-degm1-degi1, degi1-degi1, lenb2-lenb2, lena2-lena2, areaq2-(1/2)*lene2*lenn1, lene2^2+lenn1^2-lenp1^2, lenn1-lenn1, trig8-lenn1/lenp1, trig9-lenn1/lenp1, trig10-lene2/lenn1, trig11-lenn1/lene2, lenh1^2+lenk1^2-lenn1^2, lene2/lenk1-lenn1/lenh1, lene2/lenk1-lenp1/lenn1, lenn1/lenh1-lenp1/lenn1, trig12-lenk1/lenn1, trig13-lenh1/lenn1, trig14-lenh1/lenn1, trig15-lenk1/lenn1, arear2-(1/2)*lenh1*lenk1, lenk1-lenk1, trig16-lenk1/lenh1, degb1-45, degc1-60, lend1-3*2^(1/2)]), 'tord');");

The coredump Information:

#
# A fatal error has been detected by the Java Runtime Environment:
#
# EXCEPTION_STACK_OVERFLOW (0xc00000fd) at pc=0x0000000012a53f47, pid=1860, tid=7456
#
# JRE version: Java(TM) SE Runtime Environment (7.0_51-b13) (build 1.7.0_51-b13)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (24.51-b03 mixed mode windows-amd64 compressed oops)
# Problematic frame:
# C [fgbuni.dll+0xc3f47]
#
# Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
#
# If you would like to submit a bug report, please visit:
# http://bugreport.sun.com/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#

--------------- T H R E A D ---------------

Current thread (0x0000000002d94800): JavaThread "main" [_thread_in_native, id=7456, stack(0x0000000002c90000,0x0000000002d90000)]

siginfo: ExceptionCode=0xc00000fd, ExceptionInformation=0x0000000000000001 0x0000000002c90000

Registers:
RAX=0x0000000000042f40, RBX=0x0000000000010bd0, RCX=0x00000000183ec740, RDX=0x0000000000010711
RSP=0x0000000002cc7c98, RBP=0x0000000002cc7cd0, RSI=0x0000000000000000, RDI=0x00000000183ec740
R8 =0x0000000000010bd0, R9 =0x0000000000042f40, R10=0x0000000002c84000, R11=0x0000000002c90000
R12=0x0000000019821178, R13=0x0000000000010711, R14=0x00000000132c9040, R15=0x0000000000010bd0
RIP=0x0000000012a53f47, EFLAGS=0x0000000000010206

Top of Stack: (sp=0x0000000002cc7c98)
0x0000000002cc7c98: 0000000000010bd0 0000000017ab3ec8
0x0000000002cc7ca8: 000000001299ff7c 000000000002783a
0x0000000002cc7cb8: 000000000002e025 00000000132c9050
0x0000000002cc7cc8: 0000000000000001 000000001345abac
0x0000000002cc7cd8: 0000000012997bdd 0000000000000018
0x0000000002cc7ce8: 00010bd000010bce 0000000000010711
0x0000000002cc7cf8: 00000000183ec740 000000001345abdc
0x0000000002cc7d08: 0000000000000000 00000000132c9050
0x0000000002cc7d18: 0000000000000000 0000000000000068
0x0000000002cc7d28: 0000000000010bd0 00007e5476285214
0x0000000002cc7d38: 0000000000010711 0000000000010bd0
0x0000000002cc7d48: 00000000132c9040 0000000000010711
0x0000000002cc7d58: 0000000019821178 0000000000000012
0x0000000002cc7d68: 00000000129a110a 0000000000010bd0
0x0000000002cc7d78: 0000000000000000 00000000183ec740
0x0000000002cc7d88: 000000001345abc4 00000000132c9040

Instructions: (pc=0x0000000012a53f47)
0x0000000012a53f27: d0 4d 0f 42 d3 65 4c 8b 1c 25 10 00 00 00 4d 3b
0x0000000012a53f37: d3 73 16 66 41 81 e2 00 f0 4d 8d 9b 00 f0 ff ff
0x0000000012a53f47: 41 c6 03 00 4d 3b d3 75 f0 4c 8b 14 24 4c 8b 5c
0x0000000012a53f57: 24 08 48 83 c4 10 c3 cc cc 48 83 ec 28 ff 15 26

Register to memory mapping:

RAX=0x0000000000042f40 is an unknown value
RBX=0x0000000000010bd0 is an unknown value
RCX=0x00000000183ec740 is an unknown value
RDX=0x0000000000010711 is an unknown value
RSP=0x0000000002cc7c98 is pointing into the stack for thread: 0x0000000002d94800
RBP=0x0000000002cc7cd0 is pointing into the stack for thread: 0x0000000002d94800
RSI=0x0000000000000000 is an unknown value
RDI=0x00000000183ec740 is an unknown value
R8 =0x0000000000010bd0 is an unknown value
R9 =0x0000000000042f40 is an unknown value
R10=0x0000000002c84000 is an unknown value
R11=0x0000000002c90000 is an unknown value
R12=0x0000000019821178 is an unknown value
R13=0x0000000000010711 is an unknown value
R14=0x00000000132c9040 is an unknown value
R15=0x0000000000010bd0 is an unknown value

Stack: [0x0000000002c90000,0x0000000002d90000], sp=0x0000000002cc7c98, free space=223k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
C [fgbuni.dll+0xc3f47]

Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
j com.maplesoft.openmaple.Engine.evaluate(Ljava/lang/String;)Lcom/maplesoft/openmaple/Algebraic;+0
j com.tsinghuabigdata.TestMaple.main([Ljava/lang/String;)V+29
v ~StubRoutines::call_stub

--------------- P R O C E S S ---------------

Java Threads: ( => current thread )
0x000000000b214000 JavaThread "Service Thread" daemon [_thread_blocked, id=8032, stack(0x000000000c910000,0x000000000ca10000)]
0x0000000002e8e000 JavaThread "C2 CompilerThread1" daemon [_thread_blocked, id=3304, stack(0x000000000c810000,0x000000000c910000)]
0x0000000002e89000 JavaThread "C2 CompilerThread0" daemon [_thread_blocked, id=7072, stack(0x000000000c710000,0x000000000c810000)]
0x000000000b205800 JavaThread "Attach Listener" daemon [_thread_blocked, id=432, stack(0x000000000c610000,0x000000000c710000)]
0x000000000b1ae000 JavaThread "Signal Dispatcher" daemon [_thread_blocked, id=7280, stack(0x000000000c510000,0x000000000c610000)]
0x0000000002e7f000 JavaThread "Finalizer" daemon [_thread_blocked, id=8060, stack(0x000000000c410000,0x000000000c510000)]
0x0000000002e74000 JavaThread "Reference Handler" daemon [_thread_blocked, id=4448, stack(0x000000000c310000,0x000000000c410000)]
=>0x0000000002d94800 JavaThread "main" [_thread_in_native, id=7456, stack(0x0000000002c90000,0x0000000002d90000)]

Other Threads:
0x000000000b183000 VMThread [stack: 0x000000000c210000,0x000000000c310000] [id=7992]
0x000000000b21e000 WatcherThread [stack: 0x000000000ce10000,0x000000000cf10000] [id=8124]

VM state:not at safepoint (normal execution)

VM Mutex/Monitor currently owned by a thread: None

Heap
PSYoungGen total 38400K, used 2663K [0x00000007d5c80000, 0x00000007d8700000, 0x0000000800000000)
eden space 33280K, 8% used [0x00000007d5c80000,0x00000007d5f19db0,0x00000007d7d00000)
from space 5120K, 0% used [0x00000007d8200000,0x00000007d8200000,0x00000007d8700000)
to space 5120K, 0% used [0x00000007d7d00000,0x00000007d7d00000,0x00000007d8200000)
ParOldGen total 86016K, used 0K [0x0000000781600000, 0x0000000786a00000, 0x00000007d5c80000)
object space 86016K, 0% used [0x0000000781600000,0x0000000781600000,0x0000000786a00000)
PSPermGen total 21504K, used 2827K [0x000000077c400000, 0x000000077d900000, 0x0000000781600000)
object space 21504K, 13% used [0x000000077c400000,0x000000077c6c2c38,0x000000077d900000)

Card table byte_map: [0x0000000005f50000,0x0000000006370000] byte_map_base: 0x000000000236e000

Polling page: 0x0000000001080000

Code Cache [0x0000000002e90000, 0x0000000003100000, 0x0000000005e90000)
total_blobs=216 nmethods=26 adapters=143 free_code_cache=48704Kb largest_free_block=49836288

Compilation events (10 events):
Event: 0.238 Thread 0x0000000002e8e000 nmethod 15 0x0000000002eff2d0 code [0x0000000002eff4e0, 0x0000000002f00240]
Event: 0.238 Thread 0x0000000002e8e000 23 sun.nio.cs.UTF_8$Decoder::decodeArrayLoop (543 bytes)
Event: 0.252 Thread 0x0000000002e89000 nmethod 22 0x0000000002f01090 code [0x0000000002f01260, 0x0000000002f024e0]
Event: 0.252 Thread 0x0000000002e89000 24 java.lang.String::replace (127 bytes)
Event: 0.255 Thread 0x0000000002e8e000 nmethod 23 0x0000000002efb610 code [0x0000000002efb840, 0x0000000002efc3b8]
Event: 0.255 Thread 0x0000000002e8e000 25 sun.nio.cs.UTF_8$Encoder::encode (361 bytes)
Event: 0.261 Thread 0x0000000002e89000 nmethod 24 0x0000000002efd010 code [0x0000000002efd160, 0x0000000002efd598]
Event: 0.261 Thread 0x0000000002e89000 26 sun.net.www.ParseUtil::encodePath (336 bytes)
Event: 0.262 Thread 0x0000000002e8e000 nmethod 25 0x0000000002ef69d0 code [0x0000000002ef6b20, 0x0000000002ef7008]
Event: 0.278 Thread 0x0000000002e89000 nmethod 26 0x0000000002f071d0 code [0x0000000002f07400, 0x0000000002f084d8]

GC Heap History (0 events):
No events

Deoptimization events (1 events):
Event: 0.229 Thread 0x0000000002d94800 Uncommon trap: reason=unreached action=reinterpret pc=0x0000000002ef7c70 method=java.lang.String.equals(Ljava/lang/Object;)Z @ 2

Internal exceptions (10 events):
Event: 0.033 Thread 0x0000000002d94800 Threw 0x00000007d5c90778 at C:\re\jdk7u51\527\hotspot\src\share\vm\prims\jni.cpp:3991
Event: 0.161 Thread 0x0000000002d94800 Threw 0x00000007d5d5ca68 at C:\re\jdk7u51\527\hotspot\src\share\vm\prims\jvm.cpp:1244
Event: 0.167 Thread 0x0000000002d94800 Threw 0x00000007d5d62858 at C:\re\jdk7u51\527\hotspot\src\share\vm\prims\jvm.cpp:1244
Event: 0.200 Thread 0x0000000002d94800 Threw 0x00000007d5e000c0 at C:\re\jdk7u51\527\hotspot\src\share\vm\prims\jvm.cpp:1244
Event: 0.200 Thread 0x0000000002d94800 Threw 0x00000007d5e001e8 at C:\re\jdk7u51\527\hotspot\src\share\vm\prims\jvm.cpp:1244
Event: 0.236 Thread 0x0000000002d94800 Threw 0x00000007d5eb4ef8 at C:\re\jdk7u51\527\hotspot\src\share\vm\prims\jvm.cpp:1244
Event: 0.238 Thread 0x0000000002d94800 Threw 0x00000007d5ec5658 at C:\re\jdk7u51\527\hotspot\src\share\vm\prims\jvm.cpp:1244
Event: 0.239 Thread 0x0000000002d94800 Threw 0x00000007d5ecfe40 at C:\re\jdk7u51\527\hotspot\src\share\vm\prims\jvm.cpp:1244
Event: 0.243 Thread 0x0000000002d94800 Threw 0x00000007d5edb170 at C:\re\jdk7u51\527\hotspot\src\share\vm\prims\jvm.cpp:1244
Event: 0.281 Thread 0x0000000002d94800 Threw 0x00000007d5ede4e8 at C:\re\jdk7u51\527\hotspot\src\share\vm\prims\jvm.cpp:1244

Events (10 events):
Event: 0.243 loading class 0x0000000002e82650
Event: 0.243 loading class 0x0000000002e82650 done
Event: 0.281 loading class 0x0000000002e31450
Event: 0.281 loading class 0x0000000002e313f0
Event: 0.281 loading class 0x0000000002e313f0 done
Event: 0.281 loading class 0x0000000002e31450 done
Event: 0.281 loading class 0x000000000cdbc760
Event: 0.281 loading class 0x000000000cdbc760 done
Event: 4.173 Executing VM operation: EnableBiasedLocking
Event: 4.173 Executing VM operation: EnableBiasedLocking done

Dynamic libraries:
0x00007ff66ea10000 - 0x00007ff66ea43000 C:\Program Files\Java\jdk1.7.0_51\bin\javaw.exe
0x00007ffc4d3d0000 - 0x00007ffc4d57c000 C:\Windows\SYSTEM32\ntdll.dll
0x00007ffc4c160000 - 0x00007ffc4c29e000 C:\Windows\system32\KERNEL32.DLL
0x00007ffc4a2c0000 - 0x00007ffc4a3d5000 C:\Windows\system32\KERNELBASE.dll
0x00007ffc48d50000 - 0x00007ffc48dde000 C:\Windows\system32\apphelp.dll
0x00007ffc33070000 - 0x00007ffc330c3000 C:\Windows\AppPatch\AppPatch64\AcGenral.DLL
0x00007ffc4cb80000 - 0x00007ffc4cc2a000 C:\Windows\system32\msvcrt.dll
0x00007ffc49f40000 - 0x00007ffc49f6e000 C:\Windows\SYSTEM32\SspiCli.dll
0x00007ffc4cc30000 - 0x00007ffc4cc84000 C:\Windows\system32\SHLWAPI.dll
0x00007ffc4d090000 - 0x00007ffc4d207000 C:\Windows\system32\USER32.dll
0x00007ffc4c630000 - 0x00007ffc4c7c4000 C:\Windows\system32\ole32.dll
0x00007ffc4a750000 - 0x00007ffc4bc68000 C:\Windows\system32\SHELL32.dll
0x00007ffc49720000 - 0x00007ffc49741000 C:\Windows\SYSTEM32\USERENV.dll
0x00007ffc4c9a0000 - 0x00007ffc4ca4a000 C:\Windows\system32\ADVAPI32.dll
0x00007ffc3fe10000 - 0x00007ffc3fe2e000 C:\Windows\SYSTEM32\MPR.dll
0x00007ffc4c4d0000 - 0x00007ffc4c611000 C:\Windows\system32\RPCRT4.dll
0x00007ffc4cca0000 - 0x00007ffc4ccf9000 C:\Windows\SYSTEM32\sechost.dll
0x00007ffc4bc70000 - 0x00007ffc4be81000 C:\Windows\SYSTEM32\combase.dll
0x00007ffc4d270000 - 0x00007ffc4d3c1000 C:\Windows\system32\GDI32.dll
0x00007ffc4a130000 - 0x00007ffc4a145000 C:\Windows\SYSTEM32\profapi.dll
0x00007ffc48990000 - 0x00007ffc48a42000 C:\Windows\SYSTEM32\SHCORE.dll
0x00007ffc4be90000 - 0x00007ffc4bec6000 C:\Windows\system32\IMM32.DLL
0x00007ffc4c370000 - 0x00007ffc4c4c2000 C:\Windows\system32\MSCTF.dll
0x00007ffc480b0000 - 0x00007ffc4832b000 C:\Windows\WinSxS\amd64_microsoft.windows.common-controls_6595b64144ccf1df_6.0.9600.17415_none_6240486fecbd8abb\COMCTL32.dll
0x00000000521a0000 - 0x0000000052272000 C:\Program Files\Java\jdk1.7.0_51\jre\bin\msvcr100.dll
0x00000000519d0000 - 0x0000000052199000 C:\Program Files\Java\jdk1.7.0_51\jre\bin\server\jvm.dll
0x00007ffc43dd0000 - 0x00007ffc43dd9000 C:\Windows\SYSTEM32\WSOCK32.dll
0x00007ffc4a720000 - 0x00007ffc4a742000 C:\Windows\system32\WINMM.dll
0x00007ffc4ca50000 - 0x00007ffc4ca57000 C:\Windows\system32\PSAPI.DLL
0x00007ffc4d210000 - 0x00007ffc4d26a000 C:\Windows\system32\WS2_32.dll
0x00007ffc4a210000 - 0x00007ffc4a23a000 C:\Windows\system32\WINMMBASE.dll
0x00007ffc4cc90000 - 0x00007ffc4cc99000 C:\Windows\system32\NSI.dll
0x00007ffc4a490000 - 0x00007ffc4a4df000 C:\Windows\SYSTEM32\cfgmgr32.dll
0x00007ffc4a1e0000 - 0x00007ffc4a208000 C:\Windows\system32\DEVOBJ.dll
0x00000000527f0000 - 0x00000000527ff000 C:\Program Files\Java\jdk1.7.0_51\jre\bin\verify.dll
0x00000000519a0000 - 0x00000000519c8000 C:\Program Files\Java\jdk1.7.0_51\jre\bin\java.dll
0x0000000051980000 - 0x0000000051995000 C:\Program Files\Java\jdk1.7.0_51\jre\bin\zip.dll
0x00007ffc30810000 - 0x00007ffc3082d000 C:\Program Files\Maple 18\bin.X86_64_WINDOWS\jopenmaple.dll
0x00007ffc293b0000 - 0x00007ffc293c1000 C:\Windows\SYSTEM32\maplec.dll
0x00007ffc24060000 - 0x00007ffc249a1000 C:\Program Files\Maple 18\bin.X86_64_WINDOWS\maple.dll
0x00007ffc46bf0000 - 0x00007ffc46c06000 C:\Windows\SYSTEM32\NETAPI32.dll
0x00007ffc4c120000 - 0x00007ffc4c136000 C:\Windows\system32\imagehlp.dll
0x00007ffc40ea0000 - 0x00007ffc40ea8000 C:\Program Files\Maple 18\bin.X86_64_WINDOWS\libhf.dll
0x0000000180000000 - 0x000000018000e000 C:\Program Files\Maple 18\bin.X86_64_WINDOWS\pthreadVC2.dll
0x00007ffc4cac0000 - 0x00007ffc4cb76000 C:\Windows\system32\COMDLG32.dll
0x00007ffc493c0000 - 0x00007ffc493cc000 C:\Windows\SYSTEM32\netutils.dll
0x00007ffc49d60000 - 0x00007ffc49d86000 C:\Windows\SYSTEM32\srvcli.dll
0x00007ffc46bb0000 - 0x00007ffc46bc7000 C:\Windows\SYSTEM32\wkscli.dll
0x000000000d710000 - 0x000000000da54000 C:\Program Files\Maple 18\bin.X86_64_WINDOWS\libmmd.dll
0x0000000052d60000 - 0x0000000052e29000 C:\Windows\WinSxS\amd64_microsoft.vc80.crt_1fc8b3b9a1e18e3b_8.0.50727.8428_none_88dcdb0b2fb19957\MSVCR80.dll
0x00007ffc49990000 - 0x00007ffc499e9000 C:\Windows\system32\mswsock.dll
0x00007ffc40280000 - 0x00007ffc40295000 C:\Windows\system32\napinsp.dll
0x00007ffc402a0000 - 0x00007ffc402ba000 C:\Windows\system32\pnrpnsp.dll
0x00007ffc46c80000 - 0x00007ffc46c9b000 C:\Windows\system32\NLAapi.dll
0x00007ffc49790000 - 0x00007ffc49834000 C:\Windows\SYSTEM32\DNSAPI.dll
0x00007ffc40270000 - 0x00007ffc4027d000 C:\Windows\System32\winrnr.dll
0x00007ffc402c0000 - 0x00007ffc402d4000 C:\Windows\system32\wshbth.dll
0x00007ffc40ed0000 - 0x00007ffc40eda000 C:\Windows\System32\rasadhlp.dll
0x00000000669c0000 - 0x0000000066a4a000 C:\Program Files\Maple 18\bin.X86_64_WINDOWS\libmaplegmp-10.dll
0x00007ffc37130000 - 0x00007ffc37133000 C:\Windows\SYSTEM32\icmp.Dll
0x00007ffc43d50000 - 0x00007ffc43d7a000 C:\Windows\SYSTEM32\iphlpapi.DLL
0x00007ffc43d30000 - 0x00007ffc43d3a000 C:\Windows\SYSTEM32\WINNSI.DLL
0x00007ffc43590000 - 0x00007ffc435fb000 C:\Windows\System32\fwpuclnt.dll
0x00007ffc22c70000 - 0x00007ffc24051000 C:\Program Files\Maple 18\bin.X86_64_WINDOWS\mstring.dll
0x00007ffc25f40000 - 0x00007ffc26026000 C:\Program Files\Maple 18\bin.X86_64_WINDOWS\modLA.dll
0x00007ffc26e70000 - 0x00007ffc26e87000 C:\Program Files\Maple 18\bin.X86_64_WINDOWS\arraytools.dll
0x0000000012990000 - 0x0000000012d69000 C:\Program Files\Maple 18\bin.X86_64_WINDOWS\fgbuni.dll
0x00007ffc364a0000 - 0x00007ffc3662a000 C:\Windows\SYSTEM32\dbghelp.dll

VM Arguments:
jvm_args: -Djava.library.path=C:\Program Files\Maple 18\bin.X86_64_WINDOWS;D:\smartmatch\autojudge_V3\dll -Dfile.encoding=UTF-8
java_command: com.tsinghuabigdata.TestMaple
Launcher Type: SUN_STANDARD

Environment Variables:
JAVA_HOME=C:\Program Files\Java\jdk1.6.0_45
CLASSPATH=.;C:\Program Files\Java\jdk1.6.0_45\lib;C:\Program Files\Java\jdk1.6.0_45\lib\tools.jar;D:\JAVA_PATH
PATH=C:\Program Files\Maple 18\jre\bin\client;C:\Program Files\Maple 18\bin.X86_64_WINDOWS;C:\ProgramData\Oracle\Java\javapath;C:\Program Files (x86)\Common Files\NetSarang;c:\Program Files (x86)\Intel\iCLS Client\;c:\Program Files\Intel\iCLS Client\;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files (x86)\Windows Live\Shared;JAVA_HOME\bin;JAVA_HOME\jre\bin;C:\Program Files\TortoiseSVN\bin;C:\Program Files (x86)\IDM Computer Solutions\UltraEdit\;C:\Program Files\Java\jdk1.6.0_45\bin;C:\Program Files\Java\jdk1.6.0_45\jre\bin;D:\Program Files\maven\bin;C:\Python27;C:\Python27\Scripts
USERNAME=bq
OS=Windows_NT
PROCESSOR_IDENTIFIER=Intel64 Family 6 Model 69 Stepping 1, GenuineIntel

--------------- S Y S T E M ---------------

OS: Windows 8 , 64 bit Build 9200

CPU:total 4 (2 cores per cpu, 2 threads per core) family 6 model 69 stepping 1, cmov, cx8, fxsr, mmx, sse, sse2, sse3, ssse3, sse4.1, sse4.2, popcnt, avx, avx2, aes, erms, ht, tsc, tscinvbit

Memory: 4k page, physical 8290760k(3738828k free), swap 9601480k(3195268k free)

vm_info: Java HotSpot(TM) 64-Bit Server VM (24.51-b03) for windows-amd64 JRE (1.7.0_51-b13), built on Dec 18 2013 18:40:56 by "java_re" with unknown MS VC++:1600

time: Fri Apr 24 13:48:05 2015
elapsed time: 5 seconds

Hi

I have the following functional

I was wondering how I would evaluate the following in Maple

Thanks

James

Hi....how can i multiply the 9*4 matrix on the left side of this table to the 9*1 vector on the right side of it (last column) with a kind of product of cells that results a 9*4 matrix made up of cells like this one's [(a,b,c,d)⊗(e,f,g,h)=(ae,bf,cg,dh)]

can anyone help me please?

Dear all;

Thank you very much for helping me to understand this problem.

I need your help for this question, it's seem for correct but when I run the code there is no dispaly of the solution with this command  dsolve({ode,ics}) ;

ode:=x*diff(y(x),x)+y(x)=x*exp(-x^2);

ics:=y(0)=1;

dsolve(ode);

dsolve({ode,ics}) ;

Hye, have a good day everyone..

can anyone know why I got this error? :(second_grade.mw

Error, (in dsolve/numeric/bvp/convertsys) unable to convert to an explicit first-order system

Here I have attached the file. thank you in advance :)

Why can't I run a produce on the Maple IDE? I can't add Maple environment to Maple IDE. The error is this.

License expires in 29 days
|\^/| Maple 18 (X86 64 WINDOWS)
._|\| |/|_. Copyright (c) Maplesoft, a division of Waterloo Maple Inc. 2014
\ MAPLE / All rights reserved. Maple is a trademark of
<____ ____> Waterloo Maple Inc.
| Type ? for help.
Error: EnvUtils:-KernelSummary("could not validate license %1, required by %2. Please check the Install.html file under the toolbox directory for instructions on how to activate a license.\nLicense manager error: %3")
memory used=0.7MB, alloc=8.3MB, time=0.11

what means the command that `linsolve` and 

when

a:=matrix([[a1,a2],[b1,b2]])

b:=vector([c1,c2])

c:=transpose(a)

linsolve(c&*a,c&*b)

&* <<--- what is it

hi , kindly guide me how to draw combine graphs for velocity profile at different values of one parameter.  For example we have 3rd order ODE and A is parameter that is multiple of equation. now we want to see the effects of that parameter on this 3rd  order ODE.  Now  how can i sketch the  combine graph of Df(o) at A=1, 2, 3. (for example.)

thanks 

i want to plot the graph based on this equation to know the stability of this equation :

y := A*(1/x+x*exp(-2*sqrt(-1)*b))+4*sin(h)^2*(2*exp(-sqrt(-1)*b)-3*sin(h)^2*x^(-sin(h))*exp(sqrt(-1)*b*(-sin(h)-1))+3*x^(-sin(h))*exp(sqrt(-1)*b*(-sin(h)-1)))/(3*(1-r))-exp(-2*sqrt(-1)*b)/x-x;

with A = (1+r)/(1-r), r = (1/3)*sin(h)^2, b = m*Pi*h, m = 1, h=0.05

can somebody help me..??

I need to make a lot of similar calculations and wonder if it can be done in a smart way in Maple. Microsoft Excel is perfect for this kind of calculations, because you can downcopy cells. I would like to do everything in Maple, if possible, though. I have a number of points A, B, C, D, E, ... , which all lie on various circles in the plane. For every point radius and angle is given, so actually you can say that every point is delivered with polar coordinates. I want to have their rectangular coordinates. 

Maybe I could deliver their radii in a list and their angles in degrees in another list?

r:=[12,56,29,...., 78]:

v:=[15,45,75,..., 102]: 

......

I need to be able to refer to a certain point thorugh an index. At best it would be A, B, C, ... , but 1, 2, 3, ... will be acceptable. So in the end I need to be able to access say x_C and y_C or x_3 and y_3 (understood as index lowered). I hope someone can help me do the task in a nice a efefctive way.

NB! Maybe you have a solution, which involve transformation from polar to rectangular coordinates. That will be nice, but please also tell me how it can be done from scratch, because I want to be able to know about handling many points at once for other purposes, when the function is not r*cos(v), but an arbitrary function.

Regards,

Erik

Is there any some kind of environment variable(or command,package, anything...) that I can play with to tell maple consider all the constrants implied by the given expression

For Example, I want to simplify the following equation(this equation's final form is "0=0" if you take the implied constraints into account.)

 "(4*a^3*b)^(1/2)/(-(a/(4*b))^(1/2))+(4*a^3*b*(4*b/a))^(1/2) = 0" 

in real domain and this equation implies that variable a and b are both negative or positive because of the sqrt operation. And neither a nor b should be zero because they are part of a fraction's denominator.

but if i simply tell maple to simplify this equation, all the constrants will be ignored by maple, even if i use RealDomain package.

My problem is the following; Let's say that I want to make a simple program of designing of a steel beam. In order to do so, there is a respectable number of parameters that have to be taken into account - forces, geometrical characteristics etc -. So for example, I have an excel file that has the following rows

1) A row of variables  :                          LENGTH   MOMENT_OF_INERTIA   AXIAL_FORCE    HEIGHT_OF_SECTION
 
2)A row of a value for each one variable :      5                556                       130                       300


the traditional approach in maple to intoduce these values to the program would be:

LENGTH:=5
MOMENT_OF_INERTIA:=556
AXIAL_FORCE:=130                etc etc

and then when for example we write

MOMENT_OF_INERTIA/LENGTH       we get

556/5=111.2

..but for problems like this the variables may be 50 in number, even more.. and it would be very timeconsuming to define all these parameters one by one..
so what I have been looking for so much these days is a predefined maple procedure - if there is one.. - that takes a matrix which we have created in advance and that includes all the names of the variables that we want to have in the problem - let's name it VARIABLES - takes as well a matrix that we also have created in advance and includes the value that we want each of our variables to get in the problem - let's name it VALUES - and make the correspondense automatically, so as to when we introduce an epression in maple thereafter, like     MOMENT_OF_INERTIA/LENGTH, when we press enter to get  556/5=111.2  (and not just a reproducing of what we already wrote , MOMENT_OF_INERTIA/LENGTH ..).. Do you think that there is an easy way to do so??

many thanks in advance!