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+--- Thread: BUG with AUTOSIMPLIFY() flag (/thread-11141.html)
BUG with AUTOSIMPLIFY() flag - compsystems - 07-29-2018 06:56 PM
Hello, the following program with simplify: Maximum must print (x^2-2*x-3) = 0 and not (-2*x-3+x^2) = (2*x+3-2*x-3). The xcas programs are assuming simplify: none.
I think the AUTOSIMPLIFY() xcas command must be incorporated to control the output of the print
Thanks
place manually [shift][cas] simplify: Maximum
PHP Code:
#cas
test_simplify_flag():=
BEGIN
local list0,expr0;
local x, y;
assume( x, symbol ); // purge(x);
assume( y, symbol ); // purge(y);
autosimplify(2); // nop=none, 1=regroup, 2=simplify
print;
print("Solving a system of two equations.
Solve the following system [ y=x², y=2x+3 ]");
list0 := [ y = x^2, y = 2*x + 3 ]; print(list0);
print(""); print("> substitute y = x² in y = 2·x + 3");
expr0 := subst(list0(2),list0(1)); print(expr0);
print(""); print("> substract 2·x + 3");
expr0 := expr0-(2*x + 3); print(expr0);
Return "Done";
END;
#end
test_simplify_flag(); print (-2*x-3+x^2) = (2*x+3-2*x-3) and not x^2-2*x-3= 0