HP50G and solving equations with complex numbers
03-04-2017, 11:21 PM
Post: #9
 Simone Cerica Member Posts: 59 Joined: Mar 2014
RE: HP50G and solving equations with complex numbers
To solve systems of linear equations with complex coefficients you can use both LINSOLVE and SOLVE:

Code:
[ '(1+i)*X-Y=i' '(1-i)*X+(1+i)*Y=1' ] [ 'X' 'Y' ] LINSOLVE

returns

Code:
{ [ '(1+i)*X-Y=i' '(1-i)*X+(1+i)*Y=1' ] [ 'X' 'Y' ] } :Specific: { '1+i' 1 1 1. } [ 'X=(1+i)/2' 'Y=0' ]

to solve single equations numerically you can operate directly on the stack:

to enter complex numbers in polar form can be useful these programs:

Code:
\<< \-> X Y \<< { X Y } XNUM EVAL DEG -19. SF CYLIN \->V2 \>> \>> 'PN' STO

syntax: "module r" "argument φ" PN --> (r,\<)φ)
ex: '\v/2' 45 PN --> (1.41421356237,\<)45.)

Code:
\<< -16 FS? IF THEN -16 CF ELSE -16 SF END \>> 'RP' STO

RP switches from rectangular to polar notation and vice versa:
(1.,1.) RP --> (1.41421356237,\<)45.)
(1.41421356237,\<)45.) RP --> (1.,1.)

however, for more complex equations and non-linear systems for better use SolveSys as suggested by Han:

SolveSys 49 1.2
http://www.hpcalc.org/details/3145
SolveSys 49 Documentation
http://www.hpcalc.org/details/3146

Furthermore I strongly suggest you read the Complex Numbers Marathon: http://www.hpcalc.org/details/5114

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 Messages In This Thread HP50G and solving equations with complex numbers - jgharris - 02-28-2017, 03:00 AM RE: HP50G and solving equations with complex numbers - Han - 02-28-2017, 04:07 AM RE: HP50G and solving equations with complex numbers - Vtile - 02-28-2017, 10:11 AM RE: HP50G and solving equations with complex numbers - Gerson W. Barbosa - 02-28-2017, 12:16 PM RE: HP50G and solving equations with complex numbers - Vtile - 02-28-2017, 01:39 PM RE: HP50G and solving equations with complex numbers - Han - 02-28-2017, 12:26 PM RE: HP50G and solving equations with complex numbers - Vtile - 02-28-2017, 07:22 PM RE: HP50G and solving equations with complex numbers - jgharris - 02-28-2017, 08:25 PM RE: HP50G and solving equations with complex numbers - Simone Cerica - 03-04-2017 11:21 PM

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