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i would also not like to ask, but if not ask, what should i do?

MaplePrimes Activity

These are replies submitted by asa12


A := Matrix([[-2,1,1],[0,2,0],[-4,1,3]]);

A:=[<-2,1,1>, <0,2,0>, <-4,1,3>];
S1 := LinearAlgebra:-Basis(A);

A:=[<-2,0,-4>, <1,2,1>, <1,0,3>];
S1 := LinearAlgebra:-Basis(A);


A:=`<|>`(`<,>`(-2, 0, -4), `<,>`(1, 2, 1), `<,>`(1, 0, 3));
S1 := LinearAlgebra:-NullSpace(A);

what is wrong with maple 12?


but output are not [1,4,0],[1,0,4],[1,0,1]


moreover, how to translate this condition statement?


if op(Expr)==indets(Expr3,{string,name})[countvar2-ii+1]:


i tried

if Expr.args==list(Expr3.free_symbols)[countvar2-ii]:

but not correct


 i use this expression in maple is easy

test1 := OO(AA(A,B),C)

but in python and sympy


from import x,y,z,a,b,c

but OO and AA these kind of expression can not be used

how to do?


actually I am finding geometry axioms of newton equations 

is this correct?

or is it possible?

as I have a sense that there are many possible 

systems that can embedded in newton equation



slope is tangent of angle

a right triangle with total 180 degree of 3 interior angles 


actually i would like to find a system which after solve this system will return v=u+at  and  s=u*t+1/2*a*t^2

solution := solve(unknownsys, [...]);

solution := [ v=u+at , s=u*t+1/2*a*t^2 ];

but there is only 2 equations for 5 variables, 

is there some equations missing?


is there any function input these solution set that can return an invariant?


it really works 

this prove that there is no need to use the most 

simplified logic , this intermediate result can also 


And consider wildcard bit as 1 in summation

Is correct method

Thank you very much


following the doing of exponential, it should have a sum, 

i do not understand why remove sum


if specify limit on integral, which range is correct?

i choose from 0 to 1, then does it mean that it can remove sum(..., x=0..infinity)?

hoyeung1:= sum((Int(exp(LambertW(1/(-1+x))*(-1+x)), x=0..1)), x=0..infinity);

@Axel Vogt 

when using maple 12

Warning, unable to evaluate the functions to numeric values in the region; see the plotting command's help page to ensure the calling sequence is correct

no graph

then i try

f:= x ->
  evalf( Int('t -> Re(exp(-t*LambertW(-1/t)))', 1 .. x, method=_d01ajc) )
 +evalf( Int('t -> Im(exp(-t*LambertW(-1/t)))', 1 .. x, method=_d01ajc) )*I:
g:= (-1)/f+1;
g:= f;
[Re@g, Im@g]:
plot(%, 0 .. 2, -10 .. 10, color=[red,blue, grey]);
still no graph
which version of maple can plot?

@Mariusz Iwaniuk 

thank you



sorry i use a wrong formula from googled result

after refer from

exponential1 := sum((1/n!), n=0..infinity);
exponential1 is not a decimal number, it is exp(1)
hoyeung1:= sum((Int(exp(LambertW(1/(-1+x))*(-1+x)), x)), x=0..infinity);
hoyeung2:= sum((Int(exp(LambertW(1/(-1+x!))*(-1+x!)), x)), x=0..infinity);
how to evalute hoyeung1 or hoyeung2 as a decimal number?
how to evalute hoyeung^x as a decimal number function is func1 := proc(x) return hoyeung^x end proc:
but i do not know whether
sum((Int(exp(LambertW(1/(-1+x))*(-1+x)), x))*m^x, x=0..infinity) = hoyeung^x
sum((Int(exp(LambertW(1/(-1+x!))*(-1+x!)), x))*m^x, x=0..infinity) = hoyeung^x
if not, using hoyeung^1 , then enough to calculate hoyeung^x just using power
can limit(1+(Int(exp(LambertW(1/(-1+x))*(-1+x)), x)))^x, x=infinity) = hoyeung^1 ?



power of something or differential of power such diff(y(x), x) ^ n

i do not know so want to find it

@Markiyan Hirnyk 

i use reasoning to guess two equations and dsolve, this is what i got. hope you are clear.

sol := dsolve(ln(diff(y(x),x)) = diff(y(x),x)^(1/(1-x)), y(x));
ma := subs(_C1=1, rhs(sol));
Int(exp(LambertW(1/(-1+x))*(-1+x)), x)+1;
complexplot(evalf(subs(x=m, ma)), m = -Pi .. Pi);

sol := dsolve(ln(diff(y(x),x)) = diff(y(x),x)^(1/(1-y(x))), y(x));
ma := subs(_C1=1, rhs(sol));
x-Intat(1/exp((-1+_a)*LambertW(1/(-1+_a))), _a = y(x))-_C1 = 0;
complexplot(evalf(subs(x=m, ma)), m = -Pi .. Pi);

@Markiyan Hirnyk 

How about the second one?

why dsolve not return Y(x) =

but return y(x) in a function = 0?

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