v5.13.0

ModelingToolkit v5.13.0

Diff since v5.12.1

Closed issues:

• How to avoid needing CSE? (#136)
• RFC: Domain symbolics (#175)
• Please add instructions on how to contribute (#187)
• Dulmage-Mendelson Decompositions (#188)
• Automated Model Learning and Construction (#189)
• Koopman decompositions (#194)
• Defining mixed stock flow models in ModelingToolkit (#196)
• Allow providing parameters to ODEProblem as a Dict (#311)
• Input/Output Functions (#362)
• Formulating and solving intertemporal optimization problems (#372)
• Callbacks don't update parameters in algebraic equations (#399)
• extra variables that are not states in ODESystem (#401)
• Support for initial conditions depending on parameters (#414)
• Harmonise parameter input praxis into Problems (#428)
• kappa language like specification of modular models? (#486)
• Compilation for CTarget outputs (#525)
• Support for piecewise functions (#531)
• Bug in creating an ODESystem from an array of equations (incorrect parsing of summation of terms) (#565)
• alias elimination of non-linear equations which only require linear solve (#579)
• Minimal cyclic dependent DAEs (#580)
• MT ODE solution very different from manual OrdinaryDiffEq (#585)
• build_function (CTarget) generates wrong code (#586)
• build_function needs vector of independent variables (#588)
• ODESystem does not accept matrix variables (#604)
• NonlinearProblem generation from NonlinearSystem errors (#711)
• Implicit ODE / DAE system (#721)
• Clarify relationship between pins, states and namespaces (#722)
• Open pins are not kept when combining systems (#723)
• Matrix-output functions for CTarget build_function calls (#735)
• CTarget, MATLABTarget, StanTarget Rewrite (#745)
• ode_order_lowering equation ordering (#782)
• Matrix differential equations (#797)
• Documentation revamping (#806)
• Use in ApproxFun (#822)
• Pirated functions with Symbolics.jl (#875)

Merged pull requests:

• start PDESystem documentation (#575) (@ChrisRackauckas)
• Handle mass matrix in modelingtoolkitize (#861) (@YingboMa)
• add paper tutorials and citation (#867) (@ChrisRackauckas)
• Add a bunch more documentation stuff (#873) (@ChrisRackauckas)
• Remove Num substitute overloads. (#876) (@YingboMa)