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[Launchpad Bug Tracker <1566513@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package gnome-calculator - 1:3.23.4-0ubuntu1

---------------
gnome-calculator (1:3.23.4-0ubuntu1) zesty; urgency=medium

  * New upstream release.
    - Complex numbers are handled more accurately using mpc (LP: #1566513)
    - Titlebar now displays correct app name in Unity (LP: #1615408)
  * debian/control.in:
    - Build-depend on libmpc-dev
    - Bump minimum libgtk-3-dev
  * Refreshed git_no_headerbars_in_unity.patch
  * Add git_fix_ans_value_in_popup.patch:
    - Display 'ans' value correctly in variable list

 -- Jeremy Bicha <jbicha@xxxxxxxxxx>  Mon, 06 Feb 2017 14:41:00 -0500

** Changed in: gnome-calculator (Ubuntu)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1566513

Title:
  Complex numbers are exponentiated incorrectly

Status in GNOME Calculator:
  Unknown
Status in gnome-calculator package in Ubuntu:
  Fix Released
Status in gnome-calculator source package in Xenial:
  Triaged
Status in gnome-calculator source package in Yakkety:
  Triaged

Bug description:
  The calculator incorrectly performs exponentiation if the base is
  complex and the exponent is a positive integer. Under these conditions
  the calculator exponentiates the real part of the base and leaves its
  imaginary part intact, that does not agree with the complex numbers
  operation rules. If the exponent is not a positive integer, the
  calculation is performed correctly.

  Steps to reproduce the bug:

  1. Start the program.
  2. Evaluate expression "i^2". The displayed result is "i".
  3. Evaluate expression "(1+i)^2". The displayed result is "1+i".
  4. Evaluate expression "(2+i)^2". The displayed result is "4+i".

  Please find a quick fix patch attached. I did not study its
  comprehensiveness and optimality, but it seems to work.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: gnome-calculator 1:3.16.2-1ubuntu1
  ProcVersionSignature: Ubuntu 4.2.0-34.39-generic 4.2.8-ckt4
  Uname: Linux 4.2.0-34-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Tue Apr  5 22:59:29 2016
  InstallationDate: Installed on 2014-09-29 (554 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  SourcePackage: gnome-calculator
  UpgradeStatus: Upgraded to wily on 2015-10-29 (159 days ago)

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