v3.14.0

ModelingToolkit v3.14.0

Diff since v3.13.0

Closed issues:

• Fast symbolic derivatives (#127)
• Doctests fail (#148)
• Change printing of variables (#158)
• Sparse Jacobian calculation currently needs to go through dense (#281)
• Hash of Operations and Equations (#320)
• Proper syntax of ODESystem unclear (#321)
• Compiler Target: Dagger or Neural Schedulers (#366)
• Tutorial ODE Problem does not run (#493)
• component doesn't work? (#500)
• fail to generate jacobian (#503)
• expand_derivatives doesn't expand sum of derivatives (#505)
• Multi-level ODESystem (#514)

Merged pull requests:

• automated linearity checks (#382) (@ChrisRackauckas)
• jacobian performance improvements (#499) (@shashi)
• pervasive use of sparsejacobian (#501) (@ChrisRackauckas)
• avoid promotion of constants to Operation (#506) (@shashi)
• Recurse through subexpressions in expand_derivatives (#507) (@shashi)
• Add fillzeros kwarg to build_function (#508) (@YingboMa)
• fix make_operation when op is a Variable or Expression but all args are Constant (#509) (@shashi)
• implement expand_derivatives for Equation (#510) (@simeonschaub)
• Sparse Hessians (#511) (@shashi)
• various symbolic differentiation optimizations (#512) (@shashi)
• define modelingtoolkitize for SDESystem with conversion tests (#513) (@frankschae)
• update ReactionSystem docs and add reaction dep graphs (#515) (@isaacsas)
• fix automated parallelism with sparsejacobian (#516) (@ChrisRackauckas)
• add option to disable rate law scaling for reactions (#519) (@isaacsas)
• Fix typo + add link to lambdify in docs (#521) (@briochemc)
• Fix LaTeX typo in symbolic_functions.md (#522) (@briochemc)
• Update symbolic_functions.md (#523) (@briochemc)
• Update symbolic_functions.md (#524) (@briochemc)
• Fix hessian_sparsity documentation? (#527) (@ChrisRackauckas)
• add sparsity overloads to AbstractSystems (#528) (@ChrisRackauckas)
• fix fillzeros with parallelism (#529) (@ChrisRackauckas)
• Noise scaling in reaction sys sd es 2 (#530) (@TorkelE)

v3.13.0

ModelingToolkit v3.13.0

Diff since v3.12.2

Merged pull requests:

• speed up iszero (#494) (@shashi)
• force_SA and document new options (#497) (@ChrisRackauckas)
• Fast Jacobian Sparsity (#498) (@shashi)

v3.12.2

ModelingToolkit v3.12.2

Diff since v3.12.1

Closed issues:

• build_function doesn't like array expressions with single scalar variable (#495)

Merged pull requests:

• Speed up JumpSystem generation from ReactionSystems (#444) (@isaacsas)
• safer OOP conversion strategies (#496) (@ChrisRackauckas)

v3.12.1

ModelingToolkit v3.12.1

Diff since v3.12.0

Merged pull requests:

• Jacobians safe for LabelledArrays (#492) (@ChrisRackauckas)

v3.12.0

ModelingToolkit v3.12.0

Diff since v3.11.1

Merged pull requests:

• Changes to make auto-optimize work (#490) (@ChrisRackauckas)
• CompatHelper: add new compat entry for "LabelledArrays" at version "1.2" (#491) (@github-actions[bot])

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)