The latest MapleCast episode, Can't Touch This, is now available on the Maplesoft website. Stephanie Rozek (that's me) guest hosts as Tom Lee is out exploring new frontiers… Paul Goossens interviews a group from Quanser about their control solutions for industry, education and research.

Maple can convert an ordinary (base 10) number into its constituents using the convert base command. eg 175 can be decomposed to its digits using: > convert(175,base,10) = [5,7,1] my question is "is there a maple command that turns [5,7,1] back to 175". obviously I could pluck out the numbers and multiply by 100,10 etc, but i'd rather have an inbuilt command. Mathematica has a command that does it: FromDigits. rgds

When I used Mathematica in graduate school, I would ubiquitously specialize a variable and then later "un"specialize it. Specifically, for example, I would write v:= x^3; Then, later, when I wanted the symbol "v" to be left symbolically, I would redefine it with nothing following the definition v:=; I forgot the exact syntax, but it was something like this. But, I cannot find this feature in Maple. Yet I badly need it. Currently, for me to recover the use of a symbolic variable name like 'v', I have to CLOSE DOWN MY DOCUMENT and REOPEN IT! Secondly, in Mathematica, I easily evaluated the "independent" variable to a value

The Maple overload command provides a useful mechanism for splitting the implementation of a procedure that operates on different types of arguments into separate procedures. This article describes the mechanism that it uses to select the procedures, illustrates subtle issues, and shows how they can be resolved.

Hi there, So I'm having this strange experience using dchange and then simplify: doing this: Int(Int(F(u,v),u=abs(v-1)..(v+1)),v=0..1); PDEtools[dchange](u=sqrt(1+v^2-2*v*mu),%,[mu]); simplify(%) assuming v>0; gives the sensible answer: -(Int(v*(Int(F(mu, v)/sqrt(1+v^2-2*v*mu), mu = 1 .. -1)), v = 0 .. 1)) But if I try to simplify on the same line as the dchange: Int(Int(F(u,v),u=abs(v-1)..(v+1)),v=0..1); simplify(PDEtools[dchange](u=sqrt(1+v^2-2*v*mu),%,[mu])) assuming v>0; i get -v*(Int(Int(F(mu, v, v)/sqrt(1+v^2-2*v*mu), mu = 1 .. -1), v = 0 .. 1))

Hi, I´m using Maple V11.01 and as OS Windows XP SP2. The font antialiasing function is not working, there is no difference, when the font antialiasing is enabled or disabled in the display options. The fonts are very ugly. Has anybody the same problem or is there a solution ?

What is the volume of a pizza of radius z and thickness a? acer

What is the command which returns the length of a list? i.e. length of [1,2,3] is 3 ? More importantly, please tell me where in the help menu this command is listed. Thank you.

The latest edition of TUGboat (vol. 28 no. 2, 2007), the journal of the TeX users group, contains an article by Edward Reingold, Writing numbers in words in TeX, which, as its title states, gives TeX macros for converting integers to names. In this case, American English names. For my amusement Sunday I wrote the equivalent procedure in Maple.

Whenever I try to copy and paste between two worksheets in Maple 8, Maple crashes when I attempt to save the file following the paste. The paste operation appears to work; it is only when I go to save the file that it crashes. Is this a font related problem? Is there any way around this that will preserve the format of the text? Thanks!

Maple 11.00, Standard GUI, worksheet mode.

plot(sin(x),x=-10..10,legend="__never_display_this_legend_entry");

It's magic. The LEGEND() call is present in the PLOT structure, but it doesn't get displayed.

acer

Hi How do I find the max possible volume of the following cylinder when volume given as V=pi(6r^2 -r^3). The sum of its radius and height is 6cm.

I've created a new blog entry concerning what I think might be an idea worth consideration:     slide rule

... I doubt that there has ever been a better way to learn the relationship between numbers - and even mathematics in general - than the slide-rule from days-gone-by, and the ability to plot functions using modern computer technology. For the young people here who may not have ever used a slide rule, below is a link to a virtual slide rule:     virtual slide rule

I wish, and think...

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