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sundials

Description

The Chicken sundials library provides bindings to the solvers from the SUNDIALS library. SUNDIALS (SUite of Nonlinear and DIfferential/ALgebraic equation Solvers) is a collection of solvers for systems of ordinary differential equations and differential-algebraic equations.

The Chicken sundials library provides interfaces to the CVODE and IDA solvers and has been tested with SUNDIALS version 2.4.0.

Library procedures

IDA solver interface

<procedure>(ida-create-solver TSTART TSTOP VARIABLES DERIVATIVES RESIDUAL-MAIN

		      [RESIDUAL-INIT] [RESIDUAL-EVENT]
		      [ALG-OR-DIFF]   [SUPPRESS] [IC]
		      [USER-DATA]     [EVENTS] [RELTOL] [ABSTOL])</procedure>

Creates and initializes an object representing a problem to be solved with the IDA solver.

Arguments TSTART and TSTOP are real numbers that represent the beginning and end of the independent variable range.

Arguments VARIABLES and DERIVATIVES must be SRFI-4 f64vector objects that hold respectively the initial values and derivatives of the system variables.

Argument RESIDUAL-MAIN computes the residual function F and must be a procedure of the following form:

(LAMBDA T YY YP RR DATA)

where

T
real-valued independent variable
YY
SRFI-4 f64vector with current variable values
YP
SRFI-4 f64vector with current variable derivatives
RR
SRFI-4 f64vector residual vector, which must be set by this procedure
DATA
is a user data object (if set)
[procedure] (ida-destroy-solver)
[procedure] (ida-solve)
[procedure] (ida-yy)
[procedure] (ida-yp)
[procedure] (ida-get-last-order)
[procedure] (ida-get-num-steps)
[procedure] (ida-get-last-step)

Example

 
(with-server-connection h "localhost" 11211
     (let ((foo 4))
       (let ((success (set h "foo" foo)))
	 (let ((foo1 (get h "foo")))
	   (equal? foo foo1)))))

Version History

License

 
 Copyright 2011 Ivan Raikov.
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are
 met:
 
 Redistributions of source code must retain the above copyright
 notice, this list of conditions and the following disclaimer.
 
 Redistributions in binary form must reproduce the above copyright
 notice, this list of conditions and the following disclaimer in the
 documentation and/or other materials provided with the distribution.
 
 Neither the name of the author nor the names of its contributors may
 be used to endorse or promote products derived from this software
 without specific prior written permission.
 
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 OF THE POSSIBILITY OF SUCH DAMAGE.