Le forum de XCAS

Hello An idea The online version of FLTK works well and has a good design, https://www-fourier.univ-grenoble-alpes.fr/~parisse/xcas.html but I've noticed that students prefer a calculator-style interface. That's why they prefer the HP Prime simulator with its application menu. It would be great to s...

Another option to avoid using nested function commands f(f(f()) is to accept the desired output as an argument. solve(expression, var, 'expand') For example, expands the output. solve(expression, var, 'simplify') Simplifies the output. solve(expression, var, 'transpose') Transposes the output. solve...

subst works well, but the | operator is a more natural notation. I say this so that students use the encoding closest to what appears in the math books, so it would be a good idea to make the | operator accept special arguments as an operation. Furthermore, using mathematical symbols instead of nest...

Hi, when solving a system, if the variables are specified as a column vector (n*1 matrix), display the output in the same way to avoid having to perform a transposition. solve( [[(3*α1+α2+2*α3) = 0], [(-α1-α2) = 0],[(-5*α1-3*α2-2*α3) = 0], [(9*α1+3*α2+6*α3) = 0]], [α1,α2,α3], '=') => set[[α1 = -α3, ...

Okay, it works correctly. A situation where the evaluation operator appears to malfunction. [[1,0], [0,1]] * [[α1], [α2]] = [[(-1/3)*x+(2/3)*y], [(2/3)*x-(1/3)*y]] => [[α1=(-x/3+2*y/3)], [α2=(2*x/3-y/3)]] simplify( α1*[[1],[2]]+ α2*[[2],[1]]=[[x],[y]] | [[α1=(-x/3+2*y/3)],[α2=(2*x/3-y/3)]] => [[α1+2...

Running in xcas mode, correct. To avoid converting to a list, the solve cmd it should accept an array of equations that come from, for example, a linear combination. solve( [[(α1+α2-α3) = 2], [(α1-α2-α3) = 1], [(α1-α2+α3) = 2], [(α1+α2+α3) = 3]], [α1,α2,α3],'=') --------------------------- ([[1,1,-1...

I copied the first independent term incorrectly =) and the list of variables enclosed in curly braces {} solve( convert( [[(α1+α2-α3) = 2],[(α1-α2-α3) = 1],[(α1-α2+α3) = 2],[(α1+α2+α3) = 3]],list), [α1,α2,α3],'=') => set[[equal(α1,2),equal(α2,1/2),equal(α3,1/2)]] But when copying the output, it deco...

Hi, when converting an array to a list, the visual conversion looks fine, but when reading the list, it appears as a formatting instruction equal( , ). For this reason, I think Solve can't calculate it. solve(convert([[(α1+α2-α3) = 1],[(α1-α2-α3) = 1],[(α1-α2+α3) = 2],[(α1+α2+α3) = 3]],list),{α1,α2,...

The links in the documentation are not working.

https://www-fourier.univ-grenoble-alpes ... md_en.html

Hi, I can't find the online version; it used to be at this link.

https://www-fourier.ujf-grenoble.fr/~parisse/xcas.html

Hello, I have a question about solving a generator system. augmented matrix A |X: [[3,1,x1], [2,1,x2], [1,-2,x3]] ref([[3,1,x1],[2,1,x2],[1,-2,x3]],keep_pivot) [enter] [[1,-2,x3], [0,5,x2-2*x3], [0,0,5*x1-7*x2-x3]] 0=5*x1-7*x2-x3 (restriction in the last row ) last row but ref([[3,1,x1],[2,1,x2],[1,...

If symbolically (a<b)+c is interpreted as an inequality, adding +c to it, (b+c)>(a+c), arithmetically it has to be the same to be consistent.

Why does the computational engine apply the rule of evaluating the left side first when it is an arithmetic operation? This is a standard in other CASs.

Hello
Please expand the functionality to accept a vector.

Hi, the command ARG() says Angle of a vector The arg command finds the angle of a complex number (the argument) or the angle of a vector defined by two points. arg takes v, a number or a vector defined by two points. arg(v) returns the argument of v if v is a complex number or the angle between the ...