BUG with advanced functions - Printable Version +- HP Forums ( https://www.hpmuseum.org/forum)+-- Forum: HP Calculators (and very old HP Computers) ( /forum-3.html)+--- Forum: HP Prime ( /forum-5.html)+--- Thread: BUG with advanced functions ( /thread-11705.html) |

BUG with advanced functions - compsystems - 10-31-2018 07:25 PM
Hello, users and developer group of the famous hp-prime calculator Sorry for my technical english. I report the problem Define 2 * X - 3 * Y <= 6 for example in V2 variable and calculator in Spanish language When pressing the [num] the table of values informs TRUE but in Spanish it is "Verdadero" and FALSE "Falso" in previous versions this did not happen. Now You can also define the functions from CAS mode V2(X,Y) := (2*X-3*Y)≤6 [Enter] returns (X,Y)->(2*X-3*Y)≤6 // ok right(V2) [Enter](2*X-3*Y)≤6 // ok then we want to see the solutions solve(right(V2),X) [Enter] returns {X≤((3*Y+6)/2)} // ok solve(right(V2),Y) [Enter] returns {Y≥((2*X-6)/3)} // ok solve(right(V2),X,'=') [Enter] failure [[]] solve(right(V2),Y,'=') [Enter] failure [[]] Another case V1(X,Y) := (X²/3 - Y²/5 = 1) [Enter] returns (X,Y)->(((X^2/3)-(Y^2/5))==1) // Bug, since == implies comparison) in previous versions returned (X,Y)->(((X^2/3)-(Y^2/5))=1) right(V1) [Enter] returns 0 -> false // Bug because it evaluates the comparison (((X^2/3)-(Y^2/5)) == 1 is false in the last Versión: 2.1.14181 (2018 10 16) The problem still persists. V1(X,Y) := (X²/3 - Y²/5 = 1) [Enter] returns 0 (synonyms of false) solve(right(V1),Y,'=') [Enter] returns a previous message "Warning, argument is not an equation, solving V1=00" then [[]] solve(right(V1),Y,) [Enter] returns a previous message "Warning, argument is not an equation, solving ((X²/3-Y²/5)==1 )=0" then {(-1/3)*sqrt(15)*sqrt(X^2-3), (1/3)*sqrt(15)*sqrt(X^2-3)} Thanks JaiMeza |