Changeset ad3ca2d in git
- Timestamp:
- Oct 28, 2017, 12:23:10 PM (6 years ago)
- Branches:
- (u'spielwiese', 'fe61d9c35bf7c61f2b6cbf1b56e25e2f08d536cc')
- Children:
- 0295e4d87eff012ab050926b956ceff356c50508
- Parents:
- 4704f1f58e76fe37b2ac4d5e330d86117c6c852c
- File:
-
- 1 edited
Legend:
- Unmodified
- Added
- Removed
-
Singular/LIB/fpadim.lib
r4704f1f rad3ca2d 31 31 @* monomial in V the whole graph can be described only from the knowledge 32 32 @* of the mistletoes. Note that V corresponds to a basis of A/<GB>, so 33 @* knowing the mistletoes we know a K-basis. For more details see 34 @* [studzins]. This package uses the Letterplace format introduced by 35 @* [lls]. The algebra can either be represented as a Letterplace ring or 36 @* via integer vectors: Every variable will only be represented by its 37 @* number, so variable one is represented as 1, variable two as 2 and so 38 @* on. The monomial x_1*x_3*x_2 for example will be stored as (1,3,2). 39 @* Multiplication is concatenation. Note that there is no algorithm for 40 @* computing the normal form yet, but for our case it is not needed. 33 @* knowing the mistletoes we know a K-basis. The name mistletoes was given 34 @* to those points because of these miraculous value and the algorithm is 35 @* named sickle, because a sickle is the tool to harvest mistletoes. 36 @* For more details see [studzins]. This package uses the Letterplace 37 @* format introduced by [lls]. The algebra can either be represented as a 38 @* Letterplace ring or via integer vectors: Every variable will only be 39 @* represented by its number, so variable one is represented as 1, 40 @* variable two as 2 and so on. The monomial x_1*x_3*x_2 for example will 41 @* be stored as (1,3,2). Multiplication is concatenation. Note that there 42 @* is no algorithm for computing the normal form yet, but for our case it 43 @* is not needed. Note that the name fpadim.lib is short for dimensions of 44 @* finite presented algebras. 41 45 @* 42 46 43 R eferences:47 REFERENCES: 44 48 45 49 @* [ufna] Ufnarovskij: Combinatorical and asymptotic methods in algebra, 1990 … … 49 53 associative algebras, Diploma thesis, RWTH Aachen, 2010 50 54 51 A ssumptions:55 ASSUMPTIONS: 52 56 @* - basering is always a Letterplace ring 53 57 @* - all intvecs correspond to Letterplace monomials … … 59 63 PROCEDURES: 60 64 61 lpGkDim(G); computes the Gelfand Kirillov dimension of A/<G>65 lpGkDim(G); computes the Gelfand Kirillov dimension of A/<G> 62 66 ivDHilbert(L,n[,d]); computes the K-dimension and the Hilbert series 63 67 ivDHilbertSickle(L,n[,d]); computes mistletoes, K-dimension and Hilbert series
Note: See TracChangeset
for help on using the changeset viewer.