Here are the classes, structs, unions and interfaces with brief descriptions:

[detail level 12]

Tempus
AdjointAuxSensitivityModelEvaluator	ModelEvaluator for forming adjoint sensitivity equations
AdjointSensitivityModelEvaluator	ModelEvaluator for forming adjoint sensitivity equations
AuxiliaryIntegralModelEvaluator	ModelEvaluator for integrating auxiliary equations
CombinedForwardSensitivityModelEvaluator	Transform a ModelEvaluator's sensitivity equations to its residual
Stepper	Thyra Base interface for time steppers
SolutionHistory	SolutionHistory is basically a container of SolutionStates. SolutionHistory maintains a collection of SolutionStates for later retrival and reuse, such as checkpointing, restart, and undo operations
TimeStepControl	TimeStepControl manages the time step size. There several mechanicisms that effect the time step size and handled with this class:
Integrator	Thyra Base interface for time integrators. Time integrators are designed to advance the solution from an initial time, , to a final time,
IntegratorAdjointSensitivity	Time integrator suitable for adjoint sensitivity analysis
IntegratorBasic	Basic time integrator
IntegratorForwardSensitivity	Time integrator implementing forward sensitivity analysis
IntegratorObserver	IntegratorObserver class for time integrators
IntegratorObserverBasic	IntegratorObserverBasic class for time integrators. This basic class has simple no-op functions, as all basic functionality should be handled through other methods
IntegratorObserverComposite	This observer is a composite observer,
IntegratorObserverLogging	This observer logs calls to observer functions. This observer simply logs and counts the calls to each of the observer functions. This is useful in monirtoring and debugging the time integration
IntegratorObserverNoOp	IntegratorObserverNoOp class for time integrators. This basic class has simple no-op functions, as all basic functionality should be handled through other methods
IntegratorObserverSubcycling	IntegratorObserverSubcycling class for time integrators. This basic class has simple no-op functions, as all basic functionality should be handled through other methods
IntegratorPseudoTransientAdjointSensitivity	Time integrator suitable for pseudotransient adjoint sensitivity analysis
IntegratorPseudoTransientForwardSensitivity	Time integrator suitable for pseudotransient forward sensitivity analysis
Interpolator	Base strategy class for interpolation functionality
InterpolatorFactory	Interpolator factory
InterpolatorLagrange	Concrete implemenation of `Interpolator` that does simple lagrange interpolation
PhysicsState	PhysicsState is a simple class to hold information about the physics
RKButcherTableau	Runge-Kutta methods
SensitivityModelEvaluatorBase	A ModelEvaluator decorator for sensitivity analysis
SolutionState	Solution state for integrators and steppers. SolutionState contains the metadata for solutions and the solutions themselves
SolutionStateMetaData	Solution state meta data
StaggeredForwardSensitivityModelEvaluator	Transform a ModelEvaluator's sensitivity equations to its residual
StepperBackwardEuler	Backward Euler time stepper
StepperBackwardEulerTimeDerivative	Time-derivative interface for Backward Euler
StepperFactory	Stepper factory
StepperBackwardEulerAppAction	Application Action for StepperBackwardEuler
StepperBackwardEulerAppActionComposite	This composite AppAction loops over added AppActions
StepperBackwardEulerModifierBase	Base modifier for StepperBackwardEuler
StepperBackwardEulerModifierDefault	Default modifier for StepperBackwardEuler
StepperBackwardEulerModifierXBase	Base ModifierX for StepperBackwardEuler
StepperBackwardEulerModifierXDefault	Default ModifierX for StepperBackwardEuler
StepperBackwardEulerObserver	StepperBackwardEulerObserver class for StepperBackwardEuler
StepperBackwardEulerObserverBase	Base observer for StepperBackwardEuler
StepperBackwardEulerObserverDefault	Default observer for StepperBackwardEuler
StepperBDF2	BDF2 (Backward-Difference-Formula-2) time stepper
StepperBDF2TimeDerivative	Time-derivative interface for BDF2
StepperBDF2Observer	StepperBDF2Observer class for StepperBDF2
StepperDIRK	Diagonally Implicit Runge-Kutta (DIRK) time stepper
StepperDIRKTimeDerivative	Time-derivative interface for DIRK
StepperExplicit	Thyra Base interface for implicit time steppers
StepperExplicitRK	Explicit Runge-Kutta time stepper
StepperForwardEuler	Forward Euler time stepper
StepperForwardEulerAppAction	Application Action for StepperForwardEuler
StepperForwardEulerAppActionComposite	This composite AppAction loops over added AppActions
StepperForwardEulerModifierBase	Base modifier for StepperBackwardEuler
StepperForwardEulerModifierDefault	Default modifier for StepperForwardEuler
StepperForwardEulerModifierXBase	Base ModifierX for StepperForwardEuler
StepperForwardEulerModifierXDefault	Default ModifierX for StepperForwardEuler
StepperForwardEulerObserver	StepperForwardEulerObserver class for StepperForwardEuler
StepperForwardEulerObserverBase	Base observer for StepperForwardEuler
StepperForwardEulerObserverDefault	Default observer for StepperForwardEuler
StepperHHTAlpha	HHT-Alpha time stepper
StepperIMEX_RK	Implicit-Explicit Runge-Kutta (IMEX-RK) time stepper
StepperIMEX_RKTimeDerivative	Time-derivative interface for IMEX RK
StepperIMEX_RK_Partition	Partitioned Implicit-Explicit Runge-Kutta (IMEX-RK) time stepper
StepperIMEX_RKPartTimeDerivative	Time-derivative interface for Partitioned IMEX RK
ImplicitODEParameters
StepperImplicit	Thyra Base interface for implicit time steppers
StepperLeapfrog	Leapfrog time stepper
StepperLeapfrogObserver	StepperLeapfrogObserver class for StepperLeapfrog
StepperNewmarkExplicitAForm	Newmark Explicit time stepper
StepperNewmarkImplicitAForm	Newmark time stepper in acceleration form (a-form)
StepperNewmarkImplicitDForm	Newmark time stepper
StepperObserver	StepperObserver class for Stepper class
StepperObserverBasic	StepperObserverBasic class for Stepper class
StepperObserverComposite	This observer is a composite observer,
StepperOperatorSplit	OperatorSplit stepper loops through the Stepper list
StepperOperatorSplitAppAction	StepperOperatorSplitAppAction class for StepperOperatorSplit
StepperOperatorSplitAppActionComposite	This composite AppAction loops over added AppActions
StepperOperatorSplitModifierBase	Base modifier for OperatorSplit
StepperOperatorSplitModifierDefault	Default modifier for StepperOperatorSplit
StepperOperatorSplitModifierXBase	Base ModifierX for StepperOperatorSplit
StepperOperatorSplitModifierXDefault	Default ModifierX for StepperOperatorSplit
StepperOperatorSplitObserver	StepperOperatorSplitObserver class for StepperOperatorSplit
StepperOperatorSplitObserverBase	Base observer for StepperOperatorSplit
StepperOperatorSplitObserverDefault	Default observer for StepperOperatorSplit
StepperOptimizationInterface	Stepper interface to support full-space optimization
StepperRKBase	Base class for Runge-Kutta methods, ExplicitRK, DIRK and IMEX
StepperRKAppAction	Application Action for StepperRKBase
StepperRKAppActionComposite	This composite AppAction loops over added AppActions
StepperERK_ForwardEuler	Forward Euler Runge-Kutta Butcher Tableau
StepperERK_4Stage4thOrder	Runge-Kutta 4th order Butcher Tableau
StepperERK_BogackiShampine32	Explicit RK Bogacki-Shampine Butcher Tableau
StepperERK_Merson45	Explicit RK Merson Butcher Tableau
StepperERK_3_8Rule	Explicit RK 3/8th Rule Butcher Tableau
StepperERK_4Stage3rdOrderRunge	RK Explicit 4 Stage 3rd order by Runge
StepperERK_5Stage3rdOrderKandG	RK Explicit 5 Stage 3rd order by Kinnmark and Gray
StepperERK_3Stage3rdOrder	RK Explicit 3 Stage 3rd order
StepperERK_3Stage3rdOrderTVD	RK Explicit 3 Stage 3rd order TVD
StepperERK_3Stage3rdOrderHeun	RK Explicit 3 Stage 3rd order by Heun
StepperERK_Midpoint	RK Explicit Midpoint
StepperERK_Ralston	RK Explicit Ralston
StepperERK_Trapezoidal	RK Explicit Trapezoidal
StepperERK_SSPERK54	Strong Stability Preserving Explicit RK Butcher Tableau
StepperERK_General	General Explicit Runge-Kutta Butcher Tableau
StepperDIRK_BackwardEuler	Backward Euler Runge-Kutta Butcher Tableau
StepperSDIRK_2Stage2ndOrder	SDIRK 2 Stage 2nd order
StepperSDIRK_3Stage2ndOrder	SDIRK 3 Stage 2nd order
StepperSDIRK_2Stage3rdOrder	SDIRK 2 Stage 3rd order
StepperEDIRK_2Stage3rdOrder	EDIRK 2 Stage 3rd order
StepperDIRK_1StageTheta	SDIRK 1 Stage Theta
StepperEDIRK_2StageTheta	EDIRK 2 Stage Theta Method
StepperEDIRK_TrapezoidalRule	RK Trapezoidal Rule (A.K.A. RK Crank-Nicolson)
StepperSDIRK_ImplicitMidpoint	SDIRK Implicit Midpoint
StepperSDIRK_SSPDIRK22	Strong Stability Preserving Diagonally-Implicit RK Butcher Tableau
StepperSDIRK_SSPDIRK32	Strong Stability Preserving Diagonally-Implicit RK Butcher Tableau
StepperSDIRK_SSPDIRK23	Strong Stability Preserving Diagonally-Implicit RK Butcher Tableau
StepperSDIRK_SSPDIRK33	Strong Stability Preserving Diagonally-Implicit RK Butcher Tableau
StepperDIRK_1Stage1stOrderRadauIA	RK Implicit 1 Stage 1st order Radau IA
StepperDIRK_2Stage2ndOrderLobattoIIIB	RK Implicit 2 Stage 2nd order Lobatto IIIB
StepperSDIRK_5Stage4thOrder	SDIRK 5 Stage 4th order
StepperSDIRK_3Stage4thOrder	SDIRK 3 Stage 4th order
StepperSDIRK_5Stage5thOrder	SDIRK 5 Stage 5th order
StepperSDIRK_21Pair	SDIRK 2(1) pair
StepperDIRK_General	General Implicit Runge-Kutta Butcher Tableau
StepperRKModifierBase	Base modifier for StepperRK
StepperRKModifierDefault	Default modifier for StepperRK
StepperRKModifierXBase	Base ModifierX for StepperRK
StepperRKModifierXDefault	Default ModifierX for StepperRK
StepperRKObserver	StepperRKObserver class for StepperRK
StepperRKObserverBase	Base observer for StepperRK
StepperRKObserverComposite	This observer is a composite observer,
StepperRKObserverDefault	Default observer for StepperRK
StepperRKObserverLogging	This observer logs calls to observer functions. This observer simply logs and counts the calls to each of the observer functions. This is useful in monirtoring and debugging the time integration
StepperStaggeredForwardSensitivity	A stepper implementing staggered forward sensitivity analysis
StepperState	StepperState is a simple class to hold state information about the stepper
StepperSubcycling	Subcycling time stepper
StepperSubcyclingAppAction	Application Action for StepperSubcycling
StepperSubcyclingAppActionComposite	This composite AppAction loops over added AppActions
StepperSubcyclingModifierBase	Base modifier for StepperSubcycling
StepperSubcyclingModifierDefault	Default modifier for StepperSubcycling
StepperSubcyclingModifierXBase	Base ModifierX for StepperSubcycling
StepperSubcyclingModifierXDefault	Default ModifierX for StepperSubcycling
StepperSubcyclingObserver	StepperSubcyclingObserver class for StepperSubcycling
StepperSubcyclingObserverBase	Base observer for StepperSubcycling
StepperSubcyclingObserverDefault	Default observer for StepperSubcycling
StepperTrapezoidal	Trapezoidal method time stepper
StepperTrapezoidalTimeDerivative	Time-derivative interface for Trapezoidal method
StepperTrapezoidalObserver	StepperTrapezoidalObserver class for StepperTrapezoidal
TimeDerivative	This interface defines the time derivative connection between an implicit Stepper and WrapperModelEvaluator
TimeEventBase	This class defines time events which can be used to "trigger" an action. Time events are points in time and/or timestep index where an an action should occur, such as, solution output (mesh and solution) diagnostic output, restart, screen dump, in-situ visualization, user-specified, or any other action
TimeEventComposite	This composite TimeEvent loops over added TimeEvents
TimeEventList	TimeEventList specifies a list of time events
TimeEventListIndex	TimeEventListIndex specifies a list of index events
TimeEventRange	TimeEventRange specifies a start, stop and stride time
TimeEventRangeIndex	TimeEventRangeIndex specifies a start, stop and stride index
TimeStepControlStrategy	StepControlStrategy class for TimeStepControl
TimeStepControlStrategyBasicVS	StepControlStrategy class for TimeStepControl
TimeStepControlStrategyComposite	StepControlStrategy class for TimeStepControl
TimeStepControlStrategyConstant	StepControlStrategy class for TimeStepControl
TimeStepControlStrategyIntegralController	StepControlStrategy class for TimeStepControl
TimeStepControlStrategyPID	StepControlStrategy class for TimeStepControl
WrapperModelEvaluator	A ModelEvaluator which wraps the application ModelEvaluator
WrapperModelEvaluatorBasic	A ModelEvaluator for residual evaluations given a state. This ModelEvaluator takes a state, x, and determines its residual, , which is suitable for a nonlinear solve. This is accomplished by computing the time derivative of the state, x_dot, (through Lambda functions), supplying the current time, and calling the application application ModelEvaluator, $f(x,\dot{x},t)$
WrapperModelEvaluatorPairIMEX	ModelEvaluator pair for implicit and explicit (IMEX) evaluations
WrapperModelEvaluatorPairIMEX_Basic	ModelEvaluator pair for implicit and explicit (IMEX) evaulations
WrapperModelEvaluatorPairIMEX_CombinedFSA	Specialization of IMEX ME for "combined" FSA method
WrapperModelEvaluatorPairIMEX_StaggeredFSA	Specialization of IMEX ME for "staggered" FSA method
WrapperModelEvaluatorPairPartIMEX_Basic	ModelEvaluator pair for implicit and explicit (IMEX) evaulations
WrapperModelEvaluatorPairPartIMEX_CombinedFSA	Specialization of IMEX-Part ME for "combined" FSA method
WrapperModelEvaluatorPairPartIMEX_StaggeredFSA	Specialization of IMEX-Part ME for "combined" FSA method
WrapperModelEvaluatorSecondOrder	A ModelEvaluator for residual evaluations given a state. This ModelEvaluator takes a state, x, and determines its residual, , which is suitable for a nonlinear solve. This is accomplished by computing the time derivative of the state, x_dot, (through Lambda functions), supplying the current time, and calling the application application ModelEvaluator, $f(\dot{x},x,t)$
Tempus_Test
PhysicsStateCounter	PhysicsStateCounter is a simple PhysicsState that counts steps
StepperPhysicsStateTest	This is a Forward Euler time stepper to test the PhysicsState
ModelEvaluator1DFEM
CDR_Model	1D CGFEM model for convection/diffusion/reaction
Basis
HarmonicOscillatorModel	Consider the ODE: $m\ddot{x} + c\dot{x} + kx=f$ where $k \geq 0$ is a constant, is a constant damping parameter, is a constant forcing parameter, and is a constant mass parameter, with initial conditions are: $\begin{eqnarray} x(0) & = & 0\\ \dot{x}(0) & = & 1 \end{eqnarray}$ It is straight-forward to show that the exact solution to this ODE is: $\begin{eqnarray} x(t) & = & t(1+0.5\tilde{f}t), \hspace{3.6cm} if \hspace{0.2cm} k = c = 0 \\ & = & \frac{(\tilde{c}-\tilde{f})}{\tilde{c}^2}(1-e^{-\tilde{c}t}) + \frac{f}{c}t, \hspace{1.9cm} if \hspace{0.2cm} k = 0, c\neq 0 \\ & = & \frac{1}{\sqrt{\tilde{k}}}\sin(\sqrt{\tilde{k}}t) + \frac{f}{k}\left(1-\cos(\sqrt{\tilde{k}}t) \right), \hspace{0.2cm} if \hspace{0.2cm} k > 0, c = 0 \end{eqnarray}$ where $\tilde{c}\equiv c/m$ , $\tilde{k}\equiv k/m$ and $\tilde{f}\equiv f/m$ . While it is possible to derive the solution to this ODE for the case when and $c \neq 0$ , we do not consider that case here. When , , and , our ODE simplies to a canonical differential equation model of a ball thrown up in the air, with a parabolic trajectory solution, namely $x(t) = t(1-0.5t)$ where $t\in [0,2]$ . An EpetraExt version of this simplified version of the test is implemented in Piro::MockModelEval_B (see Trilinos/packages/piro/test), where it is used to test the Piro (EpetraExt) Newmark-Beta scheme (see input_Solver_NB.xml input file). When and , this test is equivalent to the SinCos model.
SinCosModel	Sine-Cosine model problem from Rythmos. This is a canonical Sine-Cosine differential equation $\mathbf{\ddot{x}}=-\mathbf{x}$ with a few enhancements. We start with the exact solution to the differential equation $\begin{eqnarray} x_{0}(t) & = & a+b\sin((f/L)t+\phi)\\ x_{1}(t) & = & b(f/L)\cos((f/L)t+\phi) \end{eqnarray}$ then the form of the model is $\begin{eqnarray} \frac{d}{dt}x_{0}(t) & = & x_{1}(t)\\ \frac{d}{dt}x_{1}(t) & = & \left(\frac{f}{L}\right)^{2}(a-x_{0}(t)) \end{eqnarray}$ where the default parameter values are , , and , and the initial conditions $\begin{eqnarray} x_{0}(t_{0}=0) & = & \gamma_{0}[=0]\\ x_{1}(t_{0}=0) & = & \gamma_{1}[=1] \end{eqnarray}$ determine the remaining coefficients $\begin{eqnarray} \phi & = & \arctan(((f/L)/\gamma_{1})(\gamma_{0}-a))-(f/L)t_{0}[=0]\\ b & = & \gamma_{1}/((f/L)cos((f/L)t_{0}+\phi))[=1] \end{eqnarray*}$
SteadyQuadraticModel	Simple quadratic equation with a stable steady-state. This is a simple differential equation $\mathbf{\dot{x}}=\mathbf{x}^2 - b^2$ which has steady state solutions $\mathbf{x} = \pm b$ . The solution $\mathbf{x} = b$ is stable if and the solution $\mathbf{x} = -b$ is stable if . This model is used to test pseudo-transient sensitivity analysis methods
VanDerPol_IMEX_ExplicitModel	Van der Pol model formulated for IMEX
VanDerPol_IMEX_ImplicitModel	Van der Pol model formulated for IMEX-RK
VanDerPol_IMEXPart_ImplicitModel	Van der Pol model formulated for the partitioned IMEX-RK
VanDerPolModel	Van der Pol model problem for nonlinear electrical circuit
LinearRegression	Linear regression class. Copied and modified from Rythmos
Tempus_Unit_Test
StepperBackwardEulerModifierTest
StepperBackwardEulerObserverTest
StepperBackwardEulerModifierXTest
StepperForwardEulerModifierTest
StepperForwardEulerObserverTest
StepperForwardEulerModifierXTest
StepperOperatorSplitModifierTest
StepperOperatorSplitObserverTest
StepperOperatorSplitModifierXTest
StepperSubcyclingModifierTest
StepperSubcyclingObserverTest
StepperSubcyclingModifierXTest
StepperRKModifierTest	Unit test class for RK Stepper Modifier AppAction
StepperRKObserverTest	Unit test class for RK Stepper Observer AppAction
StepperRKModifierXTest
Teuchos
Thyra
AdjointLinearOpWithSolveFactory	Create a LinearOpWithSolveFactory for an adjoint linear op
AdjointPreconditioner	Concrete `PreconditionerBase` subclass that wraps a preconditioner operator in MultiVectorLinearOp
AdjointPreconditionerFactory	Concrete `PreconditionerFactoryBase` subclass that wraps a preconditioner in AdjointPreconditioner
BlockedTriangularLinearOpWithSolveFactory	Implicit subclass that takes a blocked triangular LOWB object and turns it into a LOWSB object
MultiVectorLinearOp	Implicit concrete `LinearOpBase` subclass that takes a flattended out multi-vector and performs a multi-RHS apply with it
MultiVectorLinearOpWithSolveFactory	Create a LinearOpWithSolveFactory for a flattened-out multi-vector
MultiVectorPreconditioner	Concrete `PreconditionerBase` subclass that wraps a preconditioner operator in MultiVectorLinearOp
MultiVectorPreconditionerFactory	Concrete `PreconditionerFactoryBase` subclass that wraps a preconditioner in MultiVectorPreconditioner
ReuseLinearOpWithSolveFactory	A LinearOpWithSolveFactory that is designed to reuse an already created/initialized preconditioner
ReusePreconditionerFactory	Concrete `PreconditionerFactoryBase` subclass that just returns an already created/initialized preconditioner object
ScaledIdentityLinearOpWithSolve	Implicit concrete `LinearOpBase` subclass that takes a flattended out multi-vector and performs a multi-RHS apply with it
ScaledIdentityLinearOpWithSolveFactory	Create a LinearOpWithSolveFactory for a flattened-out multi-vector
ExplicitODEParameters