v3.10.0

ModelingToolkit v3.10.0

Diff since v3.9.0

Closed issues:

• Matrix square root for operations? (#449)
• Crash on solving an identical ODEProblem a large number of times (#450)

Merged pull requests:

• Avoid GG via EvalFunc for standard diffeq usage (#451) (@ChrisRackauckas)

v3.9.0

ModelingToolkit v3.9.0

Diff since v3.8.0

Closed issues:

• zero order Jump causing crash through GeneralizedGenerated (#359)
• SpecialFunctions support seems broken (#360)
• Replace using eval in MassActionJump construction (#429)
• No support for integer or float rates for JumpSystems. (#436)
• subber not evaluating numerical expressions (#437)
• Error when creating JumpProblem while ignoring mass action and reaction rate is a parameter (#441)

Merged pull requests:

• fix #436 (#438) (@isaacsas)
• using SpecialFunctions (#439) (@ChrisRackauckas)
• register binomial (#440) (@ChrisRackauckas)
• Enable creation of Steady State Problems from Reaction Systems. (#442) (@TorkelE)
• fix GG scoping for scalar build_function (#443) (@isaacsas)
• Track external registrations of Operations, so they can be injected into generated functions. (#445) (@dpad)
• bump SymbolicUtils version (#447) (@shashi)
• Add skipzeros (#448) (@YingboMa)

v3.8.0

ModelingToolkit v3.8.0

Diff since v3.7.1

Merged pull requests:

• substituter to avoid Dict re-construction (#432) (@shashi)
• Fix issues on heterogeneous element types inside an array (#434) (@wupeifan)

v3.7.1

ModelingToolkit v3.7.1

Diff since v3.7.0

Closed issues:

• Slow jump construction likely due to substitute (#426)

Merged pull requests:

• Fix array nested sparse cases (#424) (@wupeifan)
• Enable the creation of Problems from ReactionSystems (#425) (@TorkelE)
• revert back to using a parameter eval module (#427) (@isaacsas)
• Jump problem kwarg fix (#430) (@isaacsas)

v3.7.0

ModelingToolkit v3.7.0

Diff since v3.6.4

Closed issues:

• Operation times a sparse array errors (#381)
• Symbolic derivation of Jacobian no longer working (#403)
• MTK generated function printing out a lot of messages (#406)
• Arrays of sparse matrices not sparse (#407)
• Unit tests for arrays of matrices not hooked up (#408)
• Converting Derivative to Variable does not depend on type of Derivative (#409)
• make_sub! in ReactionSystem -> NonlinearSystem should be substitute (#418)

Merged pull requests:

• Fix type of mass matrix to be based on u0 (#397) (@ChrisRackauckas)
• provide iszero for Operation to help sparse matrix addition and multiplication (#404) (@caryan)
• Update LICENSE.md (#410) (@ViralBShah)
• Enable ArrayOfArray Tests (#411) (@arnavs)
• fix convert(Variable, D(x)) (#412) (@YingboMa)
• Update docs (#416) (@mkg33)
• Add convert from ReactionSystem to NonlinearSystem (#417) (@TorkelE)
• reword a few docs / fix typos (#420) (@isaacsas)
• Fix MTK.build_function on "arrays of sparse matrices" and "arrays of arrays of sparse matrices" (#423) (@wupeifan)

v3.6.4

ModelingToolkit v3.6.4

Diff since v3.6.3

Merged pull requests:

• Fix Wfact(_t) calculation (#395) (@YingboMa)

v3.6.3

ModelingToolkit v3.6.3

Diff since v3.6.2

Closed issues:

• DAE auto detection not available (#389)
• DAE system solve produces singularity when jac = true (#390)

Merged pull requests:

• Docstring jacobian vector instead of scalar (#393) (@ArnoStrouwen)
• Automatic state detection and some performance optimization (#394) (@YingboMa)

v3.6.2

ModelingToolkit v3.6.2

Diff since v3.6.1

Merged pull requests:

• Place algebraic equations after differential equations (#391) (@YingboMa)

v3.6.1

ModelingToolkit v3.6.1

Diff since v3.6.0

Closed issues:

• Common model type generated by DSLs (#286)
• Document ReactionSystem and JumpSystem (#363)
• Extend dependency graphs to AbstractSystems and document them (#368)

Merged pull requests:

• Don't restrict the content of Constant (#387) (@YingboMa)

v3.6.0

ModelingToolkit v3.6.0

Diff since v3.5.0

Merged pull requests:

• dependency graph docs (#384) (@isaacsas)