Changeset ad3ca2d in git


Ignore:
Timestamp:
Oct 28, 2017, 12:23:10 PM (6 years ago)
Author:
Karim Abou Zeid <karim23697@…>
Branches:
(u'spielwiese', 'fe61d9c35bf7c61f2b6cbf1b56e25e2f08d536cc')
Children:
0295e4d87eff012ab050926b956ceff356c50508
Parents:
4704f1f58e76fe37b2ac4d5e330d86117c6c852c
Message:
Update fpadim doc
File:
1 edited

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  • Singular/LIB/fpadim.lib

    r4704f1f rad3ca2d  
    3131@*      monomial in V the whole graph can be described only from the knowledge
    3232@*      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.
    4145@*
    4246
    43 References:
     47REFERENCES:
    4448
    4549@*   [ufna] Ufnarovskij: Combinatorical and asymptotic methods in algebra, 1990
     
    4953                     associative algebras, Diploma thesis, RWTH Aachen, 2010
    5054
    51 Assumptions:
     55ASSUMPTIONS:
    5256@* - basering is always a Letterplace ring
    5357@* - all intvecs correspond to Letterplace monomials
     
    5963PROCEDURES:
    6064
    61 lpGkDim(G);                computes the Gelfand Kirillov dimension of A/<G>
     65lpGkDim(G);                        computes the Gelfand Kirillov dimension of A/<G>
    6266ivDHilbert(L,n[,d]);       computes the K-dimension and the Hilbert series
    6367ivDHilbertSickle(L,n[,d]); computes mistletoes, K-dimension and Hilbert series
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