Power cone canonicalization

Four atoms, power, geo_mean, pnorm, and inv_prod now take a parameter approx that determines whether CVXPY canonicalizes the atom using many SOCs or one power cone. Feel free to set approx=False and report on whether it improves performance or accuracy!

Logical boolean operations

CVXPY now supports logical boolean operations on boolean expressions via the cp.logic module. The new atoms are cp.logic.AND, cp.logic.OR, cp.logic.NOT, and cp.logic.XOR.

New features

• DPP with complex expressions
• Support for ND matmul
• Support for ND cumsum
• Unification of QP interface into quadratic conic pathway
• Solving chain context
• New atom: einsum
• New atom: stack
• New solver interface: MOREAU
• New solver interface: KNITRO
• New solver interface: COSMO
• New solver interface: QPALM
• Add num_iters to Gurobi conic solver solution info

Summary

This new release totaled 115 PRs from 35 contributors.

• @7astro7 | #2825, #2976
• @atx | #2947
• @benmanns | #2894
• @brunoml5 | #3025
• @ClayCampaigne | #2929, #2933, #2935, #2944, #2956
• @davidppineiro | #2985
• @eminyouskn | #2873, #2887
• @ghackebeil | #2888
• @govindchari | #2869, #2872, #2901, #2902, #2903, #2906, #2938, #2963, #3028, #3042, #3069, #3073
• @jonathanberthias | #3043
• @kjgoodrick | #2880
• @langestefan | #2886, #2908, #2914
• @maxschaller | #3019
• @mbataillou | #2940, #2945, #2948, #2957
• @MGPowerlytics | #3044
• @mlubin | #2892
• @NDevanathan | #2970
• @Ni2002ka | #2955, #2971, #2999, #3000
• @peterbarkley | #3071
• @polsinello | #3061
• @PTNobel | #2897, #2904, #2950, #2951, #2983, #3024, #3046, #3066, #3082, #3083, #3084, #3088
• @RyuGood0 | #2990
• @sfetzel | #2987
• @stephen-huan | #3021
• @SteveDiamond | #3005, #3010, #3012, #3015, #3016, #3017, #3020, #3027, #3031, #3032, #3033, #3034, #3040, #3048, #3049, #3050, #3051, #3052, #3053, #3055, #3062, #3063, #3065, #3075, #3077
• @thisisRMak | #2920, #2924, #2925
• @tmckayus | #2870, #2918, #2919, #2989
• @TobiaMarcucci | #3030
• @Transurgeon | #2801, #2857, #2862, #2864, #2878, #2882, #2899, #2960, #2974, #2988, #2993, #3013, #3038, #3076
• @tttapa | #2898
• @warwickmm | #2913
• @yasirroni | #3058