问个关于复形之和的边界问题

lilianjie

X:=**x(0);
# ]+ L$ r+ e+ m4 b- d' t' Z' ZX;
X2:=
6 l1 D" J  V( F$ ~; c+ `**x(1);X2;
  W7 B; m3 {3 ^* y5 ]3 o8 n4 I8 t+ |X3:=**x(2);X3;
X4:=
9 x* g4 ?( O' a3 M**x(3);X4;
X5:=
**x(4);X5;
6 D8 h& r$ ]$ I5 s' j

  @. z. e" Z' N; j. P' u9 JXX:=Normalization(X5) ;
XX;
S:=Shift(XX, -2);
S;
Boundary(X5) ;
  R# @& z0 A7 n& d+ U  KBoundary(S) ;
4 s8 B7 \3 E( [K:=S + X5;K;
4 S2 p  S6 Y# E0 A8 ]2 s& S
0 Z/ X' D2 {! Q1 [- L* }  n( GBoundary(K) ;


" H8 @/ T" |# E: {/ MSimplicial complex
1 R. k  f9 {- E9 B' j[
    { 1 }
% E% |9 ~% P+ p]
6 V4 M2 v& j+ `% K
Simplicial complex
0 V% J' |7 P8 q* b[
    { 1, 2 }
]

Simplicial complex
[
3 Z! {# e0 U$ Y: v- f  @    { 1, 2, 3 }
]

$ d# H. t5 @, E. e& T5 ?. _% {5 @/ YSimplicial complex
[
( z, u6 }) M$ ?2 U    { 1, 2, 3, 4 }
]

9 c0 m, t# j, |* VSimplicial complex
[
3 r$ X3 _) }; b# Q    { 1, 2, 3, 4, 5 }
7 [3 O' Z+ ~; B  r/ T  r, z9 x0 ^]
; Y3 h( E9 F* [6 y
Simplicial complex
. H; c, U( f# H, N[
    { 1, 2, 3, 4, 5 }
]
" a4 H9 N1 R# A7 h& L! C; [" W
Simplicial complex
: e1 H- L1 A3 w+ [[
    { -1, 0, 1, 2, 3 }
% M1 w5 }# D  b]
# O  y: f; q( I/ d
8 z: Y( }8 {. h" [* |1 |4 \$ iSimplicial complex
& B( K; ]2 M( p* Z[
1 {) ^3 U9 N) x# G! M    { 1, 2, 4, 5 },
2 g( D: T+ P5 ], ]$ z3 U8 p    { 1, 2, 3, 4 },
) J7 D) N' [) U6 S7 @* i: M0 P& ]    { 1, 3, 4, 5 },
8 Z6 F$ D: K3 Z0 k3 `3 o, ?    { 1, 2, 3, 5 },
    { 2, 3, 4, 5 }
) f/ T+ s1 I! ?1 x5 r" A9 b]
2 b* C# x$ P7 n
+ u6 l" M0 F  u7 }1 w0 x: \Simplicial complex
[
    { -1, 0, 1, 3 },
    { -1, 1, 2, 3 },
0 W5 X% k4 I7 {% j! e8 D9 w    { 0, 1, 2, 3 },
6 i5 [+ P% b8 ?0 _/ ~' U    { -1, 0, 1, 2 },
    { -1, 0, 2, 3 }
' J/ }: j' |8 ?9 m5 u]

Simplicial complex
[
2 }3 S! R- i5 s, m# L, U6 ]# S4 ?    { 4, 5, 6, 7, 8 },
    { -1, 0, 1, 2, 3 }
' g& o- I9 T+ O% v]
Simplicial complex
[
    { 0, 1, 2, 3 },
1 ~8 b( g4 m& t" k" z! r    { 4, 5, 6, 8 },
    { 4, 5, 7, 8 },
    { 5, 6, 7, 8 },
    { -1, 0, 1, 3 },
    { -1, 0, 2, 3 },
    { 4, 5, 6, 7 },
) }% k0 {8 c) P/ l" v* d    { 4, 6, 7, 8 },
    { -1, 0, 1, 2 },
2 X# h$ f" r' P, {4 ~$ R2 ^    { -1, 1, 2, 3 }
+ Q5 l% q- {: k- i5 h]
# D4 |3 |- A1 q" H
, P& S! x# D: ]0 a) M0 A9 h
边界之和是怎样算出的？
5 y! O& w( J# J- I- K' @    { 4, 5, 6, 7, 8 },
    { -1, 0, 1, 2, 3 }

8 b; L& U) q; E  F

- B1 @: x1 t6 A. m5 {