问个关于复形之和的边界问题

lilianjie

X:=**x(0);
X;
! ^' F% ]9 s% W* J% F( z# lX2:=
6 ?4 p6 z" K( o- ~  `* B) T3 n**x(1);X2;
X3:=**x(2);X3;
. v5 h' M% I$ W  XX4:=
**x(3);X4;
% y+ o7 Z6 ~+ ]+ T' lX5:=
**x(4);X5;

* O$ n' l& |4 Y
XX:=Normalization(X5) ;
XX;
2 a( w1 v( M5 W( P. }S:=Shift(XX, -2);
S;
( h( |+ O. L) b+ o# `$ X2 mBoundary(X5) ;
Boundary(S) ;
K:=S + X5;K;

  R$ s: J1 [. f8 `0 W* sBoundary(K) ;


Simplicial complex
[
    { 1 }
]
3 C5 _" y% c) P" g
# K  d3 q9 X+ Z' @, A" Z0 FSimplicial complex
. U! y6 d1 B) y' }" A# E) b3 K; {[
    { 1, 2 }
]
6 g0 w0 Y. c. g7 j
Simplicial complex
% w$ s+ K9 \* P( {[
    { 1, 2, 3 }
]

9 B& s, z. H6 @' s7 l' b3 }Simplicial complex
[
    { 1, 2, 3, 4 }
7 d, [5 d' {& T; }; e9 H1 N- P' }]
* c( d+ y7 e% ?  R
; x5 y) r- x8 G+ I/ ^9 e) Z6 P5 l0 XSimplicial complex
[
    { 1, 2, 3, 4, 5 }
. B" ~/ e% t8 l/ w0 L2 ~8 ]2 z]
# @; _* U$ O' U/ @+ I
Simplicial complex
) L3 Z4 _' ?) x2 W[
    { 1, 2, 3, 4, 5 }
" T5 u0 R3 T; p6 ]( {+ ?]
2 m$ ?2 V% Y2 t% c& S, V
Simplicial complex
8 t7 m  {  p" u- D+ p% l[
    { -1, 0, 1, 2, 3 }
- E, m  v+ r( ]. L* f. y7 S" L& T) L3 e# j]

Simplicial complex
+ P6 Z) P4 P2 n+ i4 b[
    { 1, 2, 4, 5 },
: e$ d" y: J: \' C    { 1, 2, 3, 4 },
    { 1, 3, 4, 5 },
. `/ `6 I! H% S6 a# q1 b* A    { 1, 2, 3, 5 },
; O& B4 E4 q" p    { 2, 3, 4, 5 }
* {6 p' t) I' R8 [1 M$ b+ j]
8 e. k, N0 S* ]+ m; e
5 e4 L. U1 l$ K) l9 i8 r8 ?Simplicial complex
[
    { -1, 0, 1, 3 },
    { -1, 1, 2, 3 },
    { 0, 1, 2, 3 },
    { -1, 0, 1, 2 },
    { -1, 0, 2, 3 }
]
+ p2 h  I3 a: e, O
# e. P9 i' Y% h4 \$ k8 nSimplicial complex
[
, j. `3 J1 O( N% d# V3 W    { 4, 5, 6, 7, 8 },
    { -1, 0, 1, 2, 3 }
$ q) e+ u" _3 o, G]
Simplicial complex
5 A" Q* g1 z! Y. O  j2 P! K% S0 F[
' n/ i$ [9 |! `" l# b& b    { 0, 1, 2, 3 },
    { 4, 5, 6, 8 },
; r  h! R* z- T5 E9 e    { 4, 5, 7, 8 },
    { 5, 6, 7, 8 },
    { -1, 0, 1, 3 },
' Z; l1 f9 ~! O  }6 \8 t5 ]    { -1, 0, 2, 3 },
    { 4, 5, 6, 7 },
    { 4, 6, 7, 8 },
    { -1, 0, 1, 2 },
    { -1, 1, 2, 3 }
]
& q3 I0 X6 i- j& h! F( y0 ?- J
/ y$ X1 V* L2 L$ S7 M3 {8 W
8 ]9 i; |# }# k4 E边界之和是怎样算出的？
    { 4, 5, 6, 7, 8 },
    { -1, 0, 1, 2, 3 }


; ]( v8 u" U- [7 l- C, |