v3.11.1

ModelingToolkit v3.11.1

Diff since v3.11.0

Closed issues:

• Possible Julia Multithreading issue exposed by MTK generated functions? (#487)

Merged pull requests:

• sync parallel build functions (#488) (@ChrisRackauckas)
• Restructure tutorial section of the documentation (#489) (@ChrisRackauckas)

v3.11.0

ModelingToolkit v3.11.0

Diff since v3.10.2

Closed issues:

• Problem with inversion of symbolic matrices (#458)
• Problem for ldiv when left matrix is diagonal and right matrix is symbolic (#460)
• Simplification only occurs for variables which are functions (but not constants) (#468)
• Error substituting with a dictionary (#475)
• What does IR mean? (#480)

Merged pull requests:

• Add DaggerForm (#431) (@jpsamaroo)
• fix reshaped ldiv (#461) (@ChrisRackauckas)
• CompatHelper: bump compat for "SymbolicUtils" to "0.4" (#462) (@github-actions[bot])
• Inject registered functions into expressions used to build EvalFunc. (#463) (@dpad)
• Fix and test QR (#465) (@ChrisRackauckas)
• Function and Expr outs (#466) (@ChrisRackauckas)
• Document registering the derivative of a function (#469) (@YingboMa)
• fix typo in doc (#471) (@isaacsas)
• unique -> unique! in get_variables! (#473) (@isaacsas)
• hash for Operation (#474) (@shashi)
• Update substitute test (#476) (@mforets)
• Provide as_expression=false option to ODEs/SDEs, for specific use cases that need to avoid world age issues (generally not needed) (#477) (@dpad)
• CompatHelper: add new compat entry for "Requires" at version "1.0" (#478) (@github-actions[bot])
• don't call get_variables! on non-Operations for jumps (#481) (@isaacsas)
• Fix substitution with Dict (#482) (@shashi)
• avoid unnecessary terms in expand_derivatives (#485) (@shashi)

v3.10.2

ModelingToolkit v3.10.2

Diff since v3.10.1

Closed issues:

• Make diagonal matrix with variables? (#454)

Merged pull requests:

• fix tutorial by covering the other zero/one dispatches (#455) (@ChrisRackauckas)

v3.10.1

ModelingToolkit v3.10.1

Diff since v3.10.0

Closed issues:

• Crash on solving an identical JumpProblem a large number of times (#452)

Merged pull requests:

• Generate JumpProblem with EvalFunc to avoid GG (#453) (@ChrisRackauckas)

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)