Problem with -2<-1 returns 1 => true - 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: Problem with -2<-1 returns 1 => true (/thread-10926.html) Problem with -2<-1 returns 1 => true - compsystems - 06-16-2018 10:03 PM Hello A simple update for the next firmware. Please, improve the consistency in the output HOME MODE == NUMERICAL MODE CAS MODE == SYMBOLIC MODE -2<-1 returns 1 (ok for numerical value for HOME), but for the output for CAS mode should be: true 1 or 1 returns 1 1 xor 1 returns 1 It works very well in other cases, for example not(-2≤-1) returns false (ok) 1 AND 1 returns true Another examples Xcas SIMPLIFY MAXIMUM: (x+y)^2 == x^2+2*x*y+y^2 returns: true, hpprime returns 1 Xcas NONE OR SIMPLIFY MINIMUM: (x+y)^2 == x^2+2*x*y+y^2 returns: false, hpprime returns 0 RE: -2<-1 returns 1 => true - Jean-Michel - 06-19-2018 11:20 AM Hello Which revision and settings do you have? I get 1 on both calculator and emulator, be it in Textbook, Algebraic or RPN mode. Version: 2018 1 24. Rev: 13333 Regards. RE: -2<-1 returns 1 => true - JamesWilliams - 06-19-2018 12:32 PM I get the same behavior as compsystems. In CAS view, -2<-1 --> 1 -2<=-1 --> true In Home view, -2<-1 --> 1 -2<=-1 --> 1 I have version 2018-02-12 (13441) on the original hardware version A. RE: -2<-1 returns 1 => true - compsystems - 06-20-2018 05:05 PM Another case 5 - (+3) => 2 exact 5 + (-3) => 2. approx this happens sometimes, not always RE: -2<-1 returns 1 => true - JamesWilliams - 06-26-2018 03:42 PM comsystems, I cannot reproduce this behavior. Could you please specify Home View or CAS View each time you submit a problem? By the way, 5-(+3) gives a syntax error in Home View if you are explicitly putting a plus sign before the 3. RE: -2<-1 returns 1 => true - compsystems - 06-28-2018 07:49 PM Other problems Boolean operators are not yet working on CAS mode, classpad300/400 ok, ti89/92/v200, ok, hpprime =( 0: NOT(x<13) RETURNS x≥13 // ok http://www.wolframalpha.com/input/?i=NOT(x%3C13) 1: (x<13) AND (x>5) RETURNS (13>x) AND (x>5) // OK http://www.wolframalpha.com/input/?i=(x%3C13)+AND+(x%3E5) 2: (x<13) AND (x<5) RETURNS (13>x) AND (5>x) // => x<5 http://www.wolframalpha.com/input/?i=(x%3C13)+AND+(x%3C5) 3: (x<13) OR (x>5) RETURNS (13>x) OR (x>5) // => TRUE http://www.wolframalpha.com/input/?i=(x%3C13)+OR+(x%3E5) 4: (x<13) OR (x<5) RETURNS (13>x) OR (5>x) // => x<13 http://www.wolframalpha.com/input/?i=(x%3C13)+OR+(x%3C5) 5: (x<13) XOR (x<5) RETURNS 0 ? // (x>=5) AND x<13 // [5, 12) http://www.wolframalpha.com/input/?i=x%3C13+Xor+x%3C5 6: (x>=5) AND x<13 RETURNS http://www.wolframalpha.com/input/?i=(x%3E%3D5)+AND+x%3C13 RE: -2<-1 returns 1 => true - compsystems - 07-20-2018 02:45 PM These small problems have not yet been resolved. "HP Prime Graphing Calculator Software Version: 2.0.0.13865 (2018 07 06) Hardware Version: Emu CAS Version: 1.4.9 " RE: Problem with -2<-1 returns 1 => true - compsystems - 07-24-2018 05:11 PM CAS: OR 1 or 1 returns 1 => true True or True returns true XOR 1 xor 1 returns Error: syntax error => false true xor true [enter] Error: syntax error => false AND 1 and 1 returns true true and true returns true RE: Problem with -2<-1 returns 1 => true - ijabbott - 07-24-2018 08:30 PM (07-24-2018 05:11 PM)compsystems Wrote:  CAS: OR 1 or 1 returns 1 => true True or True returns true XOR 1 xor 1 returns Error: syntax error => false true xor true [enter] Error: syntax error => false AND 1 and 1 returns true true and true returns true It's not a very clear bug description, but I think the bug you are describing is that xor is not automatically changed to XOR, which is inconsistent with related operators? In that case, a related bug is that not without parentheses is not automatically changed to NOT.