Add derivatives and Hessians to test functions in argmin_testfunctions

[stefan-k]

Currently, the derivative and Hessian computation are only implemented for the Rosenbrock test function. The library would be most useful if most (if not all) other test functions had derivatives and Hessians as well. I've decided to open this issue in order to track the progress of this. If anyone is interested in taking on some (or all) of these, feel free to do so.

• Ackley Added derivative and Hessian for Ackley test function #447
  • Derivative
  • Hessian
• Beale Added derivative and Hessian for Beale test function #423
  • Derivative
  • Hessian
• Booth Added derivative and Hessian for Booth test function #426
  • Derivative
  • Hessian
• Bukin No. 6 Added derivative and Hessian for Bukin No.6 test function #427
  • Derivative
  • Hessian
• Cross-in-tray Added derivative and Hessian for Cross-in-tray test function #441
  • Derivative
  • Hessian
• Easom Added derivative and Hessian for Easom test function #428
  • Derivative
  • Hessian
• Eggholder Added derivative and Hessian for eggholder test function #435
  • Derivative
  • Hessian
• Goldstein-Price Added derivative and Hessian for Goldstein-Price test function #440
  • Derivative
  • Hessian
• Himmelblau Added derivative and Hessian for Himmelblau test function #437
  • Derivative
  • Hessian
• Holder table Added derivative and Hessian for holder_table test function #443
  • Derivative
  • Hessian
• Levy Added derivative and Hessian for Levy test function #449
  • Derivative
  • Hessian
• Levy No. 13 Added derivative and Hessian for Levy No. 13 test function #448
  • Derivative
  • Hessian
• Matyas Added derivative and Hessian for Matyas test function #432
  • Derivative
  • Hessian
• McCorminck Added derivative and Hessian for McCorminck test function #439
  • Derivative
  • Hessian
• Picheny Added derivative and Hessian for Picheny test function #445
  • Derivative
  • Hessian
• Rastrigin Added derivative and Hessian of Rastrigin test function #421
  • Derivative
  • Hessian
• Rosenbrock Added multidimensional Rosenbrock derivative and Hessian #411
  • Derivative
  • Hessian
• Schaffer No. 2 Added derivative and Hessian for Schaffer No2 and No4 test functions #433
  • Derivative
  • Hessian
• Schaffer No. 4 Added derivative and Hessian for Schaffer No2 and No4 test functions #433
  • Derivative
  • Hessian
• Sphere Added derivative and Hessian for sphere test function #422
  • Derivative
  • Hessian
• Styblinsky-Tang Added derivative and Hessian for Styblinski-Tang test function #446
  • Derivative
  • Hessian
• Three-hump camel Added derivative and Hessian for threehumpcamel test function #444
  • Derivative
  • Hessian