MaplePrimes - Newest Questions

plot syntax for two procedures

clararararararara — Sun, 08 Nov 2026 20:38:16 Z

f := x -> 6*x - 1;

g := x -> -2*x + 33;

plot(f(x), g(x));
Error, (in plot) unexpected option: -2*x+33

Use of parentheses in function application

C_R — Sun, 08 Nov 2026 20:16:59 Z

Why no parentheses around "%" are needed here

cos^2 + sin^2 = 1;
%(x);
                           2      2    
                        cos  + sin  = 1

                           2         2    
                     cos(x)  + sin(x)  = 1

as they are required here (to group terms)

(cos^2 + sin^2 = 1)(x);
                           2         2    
                     cos(x)  + sin(x)  = 1

Is it because % (?ditto) is an operator or because of an evaluation rule?

I know the opposite: Maple treats (sin)(x) the same as sin(x), i.e. removes the parentheses.
I also know that Maple has special evaluation rules for procedures (see ?last_name_eval) but the
"operator expression" cos^2 + sin^2 = 1 inside the parentheses is of type equation and not of type function/procedure.

I assume that % reevaluates a previously computed result stored in the kernel and not in the user interface but maybe I am wrong here. If equation labels are used instead of %, also no parentheses are needed, but in this case the equation label refers to output stored at the level of the user interface.

How to insert a section with the ribbon interface

C_R — Sun, 08 Nov 2026 17:29:57 Z

I could not identify a menu item in the ribbon interface under "Insert" (where it was with the former interface).

Looking for the difference of cubes

Alfred_F — Sat, 07 Nov 2026 10:02:09 Z

Let B and D be natural numbers. Prove that in the rational numbers there exist solutions (x;y) of the equation x^3-y^3=B^3+D^3 and the equation x^3-y^3=B^3-D^3, and find the solution formula and example solutions.

edited:

This problem becomes interesting when one searches for positive rational solutions x=x(B,D) and y=y(B,D).

Maple 2026.2 update

Ronan — Fri, 06 Nov 2026 16:26:23 Z

I see my Maple has updated to 2026.2 What has been inproved in this release?

A birthday puzzle

Alfred_F — Sun, 01 Nov 2026 11:03:40 Z

At a birthday party, the jubilarian in question observes:
If I substitute my current age for D in Pell X² – D Y² = 1, then X becomes my age next year, and Y is the age of my grandchild. Then how old we are?