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author | dos-reis <gdr@axiomatics.org> | 2010-06-16 16:27:37 +0000 |
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committer | dos-reis <gdr@axiomatics.org> | 2010-06-16 16:27:37 +0000 |
commit | 5b0bfceb3efc34578e1de66194b835bb48009466 (patch) | |
tree | d95fce6e28b6d37179363ad068df04e5d7d1d79f /src/algebra/catdef.spad.pamphlet | |
parent | 1ed74da03b758f49e7aa31dc1ac8a8a0860467ab (diff) | |
download | open-axiom-5b0bfceb3efc34578e1de66194b835bb48009466.tar.gz |
* algebra/catdef.spad.pamphlet (DifferentialModule): New.
(PartialDifferentialDomain): Likewise.
Diffstat (limited to 'src/algebra/catdef.spad.pamphlet')
-rw-r--r-- | src/algebra/catdef.spad.pamphlet | 57 |
1 files changed, 55 insertions, 2 deletions
diff --git a/src/algebra/catdef.spad.pamphlet b/src/algebra/catdef.spad.pamphlet index ddd378dc..32f1f3c7 100644 --- a/src/algebra/catdef.spad.pamphlet +++ b/src/algebra/catdef.spad.pamphlet @@ -406,8 +406,6 @@ DifferentialSpace(): Category == DifferentialDomain % with @ - - \section{category DIFRING DifferentialRing} <<category DIFRING DifferentialRing>>= )abbrev category DIFRING DifferentialRing @@ -432,6 +430,32 @@ DifferentialRing(): Category == Join(Ring,DifferentialSpace) @ +\section{Differential Module} + +<<category DIFFMOD DifferentialModule>>= +)abbrev category DIFFMOD DifferentialModule +++ Author: Gabriel Dos Reis +++ Date Created: June 14, 2010 +++ Date Last Updated: Jun 16, 2010 +++ Related Constructors: Module, DifferentialSpace +++ Also See: +++ Description: +++ An R-module equipped with a distinguised differential operator. +++ If R is a differential ring, then differentiation on the module +++ should extend differentiation on the differential ring R. The +++ latter can be the null operator. In that case, the differentiation +++ operator on the module is just an R-linear operator. For that +++ reason, we do not require that the ring R be a DifferentialRing; +++ +++ Axioms: +++ \spad{differentiate(x + y) = differentiate(x) + differentiate(x)} +++ \spad{differentiate(r*y) = r*differentiate(y) + differentiate(r)*y} + +DifferentialModule(R: CommutativeRing): Category == + Join(Module R, DifferentialSpace) +@ + + \section{category DIFEXT DifferentialExtension} <<category DIFEXT DifferentialExtension>>= )abbrev category DIFEXT DifferentialExtension @@ -1399,6 +1423,33 @@ OrderedSet(): Category == SetCategory with ((x: %) <= (y: %)) : Boolean == not (y < x) @ + +\section{Partial Differential Domain} + +<<category PDDOM PartialDifferentialDomain>>= +)abbrev category PDDOM PartialDifferentialDomain +++ Author: Gabriel Dos Reis +++ Date Created: June 16, 2010 +++ Date Last Modified: June 16, 2010 +++ Description: +++ This category captures the interface of domains with a distinguished +++ operation named \spad{differentiate} for partial differentiation with +++ respect to some domain of variables. +++ See Also: +++ DifferentialDomain +PartialDifferentialDomain(T: Type, S: Type): Category == Type with + differentiate: (%,S) -> T + ++ \spad{differentiate(x,v)} computes the partial derivative + ++ of \spad{x} with respect to \spad{v}. + D: (%,S) -> T + ++ \spad{D(x,v)} is a shorthand for \spad{differentiate(x,v)} + add + D(x,v) == + differentiate(x,v) + +@ + + \section{category PDRING PartialDifferentialRing} <<category PDRING PartialDifferentialRing>>= )abbrev category PDRING PartialDifferentialRing @@ -1919,6 +1970,8 @@ VectorSpace(S:Field): Category == Module(S) with <<category OAMONS OrderedAbelianMonoidSup>> <<category DIFFDOM DifferentialDomain>> <<category DIFRING DifferentialRing>> +<<category DIFFMOD DifferentialModule>> +<<category PDDOM PartialDifferentialDomain>> <<category PDRING PartialDifferentialRing>> <<category DIFEXT DifferentialExtension>> @ |