CTAN Comprehensive TeX Archive Network

CTAN up­date: pol­expr

Date: De­cem­ber 10, 2018 9:31:09 PM CET
Jean-François Burnol sub­mit­ted an up­date to the pol­expr pack­age. Ver­sion num­ber: 0.7.2 2018-12-09 Li­cense type: lp­pl1.3c Sum­mary de­scrip­tion: A parser for poly­no­mial ex­pres­sions An­nounce­ment text:
New fea­ture: find­ing all ra­tio­nal roots. For ex­am­ple, the pack­age has no prob­lem de­ter­min­ing that the ra­tio­nal roots of 1581755751184441 x^5 -14907697165025339 x^4 +48415668972339336 x^3 -63952057791306264 x^2 +46833913221154895 x -49044360626280925 are 833719/265381 < 165707065/52746197 < 355/113 (and that the re­main­ing fac­tor is sim­ply x^2 + 1). There was also a bug­fix or two and some changes, please check­out the html doc­u­men­ta­tion for de­tails (and ex­am­ples).
This pack­age is lo­cated at http://mir­ror.ctan.org/macros/la­tex/con­trib/pol­expr More in­for­ma­tion is at http://www.ctan.org/pkg/pol­expr We are sup­ported by the TeX User Groups. Please join a users group; see http://www.tug.org/user­groups.html .
Thanks for the up­load. For the CTAN Team Ina Dau --

pol­expr – A parser for poly­no­mial ex­pres­sions

The pack­age pro­vides \poldef: a parser for poly­no­mial ex­pres­sions based upon the \xint­d­ef­func mech­a­nism of the pack­age xin­t­expr.

The parsed ex­pres­sions use the op­er­a­tions of al­ge­bra (in­clu­sive of com­po­si­tion of func­tions) with stan­dard op­er­a­tors, frac­tional num­bers (pos­si­bly in sci­en­tific no­ta­tion) and pre­vi­ously de­fined poly­no­mial func­tions or other con­structs as rec­og­nized by the \xin­t­expr nu­mer­i­cal parser.

The poly­no­mi­als are then not only gen­uine \xin­t­expr nu­mer­i­cal func­tions but ad­di­tion­ally are also known to the pack­age via their co­ef­fi­cients. This al­lows ded­i­cated macros to im­ple­ment poly­no­mial al­go­rith­mics.

Pack­agepol­expr
Ver­sion0.7.2 2018-12-09
Copy­right2018 Jean-François Burnol
Main­tainerJean-François Burnol

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