solution to the problem of pre-assigned variables Z1:=3+4*i in HOME mode

[Carsen]

(07-24-2018 05:27 PM)compsystems Wrote:  With [SHIFT] + [4 / MATRIX] displays the list of variables reserved for arrays.

Correct, however recalling a matrix into the stack cannot be done with [Shift] 4 (as far as I know). Pressing [Alpha] M 1 [ENTER] in Home while in RPN mode recalls the matrix onto the stack, ready for a calculation. Typing [Alpha] M 1 in Home while in Textbook or Algebraic mode is all it takes to use a matrix in a calculation. This is what makes the preassigned variables so convenient in my eyes.

(07-24-2018 05:27 PM)compsystems Wrote:  CAS:
V1(X,Y):=X-2*Y=7; V2(X,Y):=5*X-3*Y=2; returns (X,Y)->false,(X,Y)->false ?

with Ｖ≠ V, Ｘ≠Y, Ｙ≠Y
CAS:
Ｖ1(Ｘ,Y):=Ｘ-2*Ｙ=7; Ｖ2(Ｘ,Ｙ):=5*Ｘ-3*Ｙ=2; // ok

I have a question. Why enter these equations into V1, V2, etc... on the Home and CAS view?