问个关于复形之和的边界问题

lilianjie

X:=**x(0);
X;
2 }/ k5 R) X6 [X2:=
, T  y  n0 N9 s**x(1);X2;
# V% {# w, K2 ~+ |5 wX3:=**x(2);X3;
X4:=
**x(3);X4;
$ _4 C4 @3 \' l! X, l: _0 A& GX5:=
9 a6 B- V4 @; ?1 {  \6 ^**x(4);X5;
+ X9 a2 `' ^, `, q
2 H4 j3 I- H9 M  }5 T$ E8 H
6 e" P6 W4 \2 G- F  JXX:=Normalization(X5) ;
2 p1 a1 \) u3 O# S3 [( K8 x& H0 ]XX;
S:=Shift(XX, -2);
+ y; P/ z2 k: V+ x2 F+ {9 GS;
+ [, V8 K) U5 t$ U% E; RBoundary(X5) ;
6 g/ x7 Q# h7 {- f$ Z; bBoundary(S) ;
K:=S + X5;K;
" l8 S8 g  Z7 g* Z
+ U/ S, R3 v6 E  T6 ~8 yBoundary(K) ;
6 y5 Q" G) [7 a* t6 l8 N* t1 l

6 F& m+ H# t0 E3 x- HSimplicial complex
, k& _% t0 k3 Q% Y& A/ U& s( e[
    { 1 }
/ ]# S7 V& p( i2 ?]

Simplicial complex
[
% ]. V$ ]- v: u" r4 k( ^: L9 T# [    { 1, 2 }
]

( u- E- B' ?) {0 MSimplicial complex
[
    { 1, 2, 3 }
) @6 L' D* m$ g$ G4 B]
6 T) h2 ^* h) [* J8 J+ V9 s
Simplicial complex
[
    { 1, 2, 3, 4 }
]
$ C' B3 R: G, s
6 h" S) v4 X6 c) {8 a- |1 q. B# QSimplicial complex
* b; I2 _+ o5 D3 s! G7 [7 c[
  P$ C: E+ ?; n" w' E8 n: x    { 1, 2, 3, 4, 5 }
]
; h; E6 I* y/ E9 A# `) W
, @  n  j. g& @+ o& P: HSimplicial complex
[
    { 1, 2, 3, 4, 5 }
/ m1 H% R" c, T5 g]

Simplicial complex
$ l( |1 }( i# j1 p; B[
    { -1, 0, 1, 2, 3 }
]

Simplicial complex
[
# X- h% Y7 o# l9 \) w    { 1, 2, 4, 5 },
0 L4 r( `6 {2 ~) }( t1 e    { 1, 2, 3, 4 },
    { 1, 3, 4, 5 },
- ~3 K$ u1 p$ R  ~& a# \    { 1, 2, 3, 5 },
6 v# \, M( D6 B+ j  m& Z4 H    { 2, 3, 4, 5 }
]

Simplicial complex
  e6 a3 G5 p' L0 S) n* G[
    { -1, 0, 1, 3 },
    { -1, 1, 2, 3 },
    { 0, 1, 2, 3 },
    { -1, 0, 1, 2 },
    { -1, 0, 2, 3 }
1 y" h* [  k* I8 w- e$ t% Q7 K% e5 G]

6 ~/ G3 j5 w# |Simplicial complex
[
, v% u+ Y' ?7 a+ g, {1 ?2 z    { 4, 5, 6, 7, 8 },
- U/ U3 z2 w& A    { -1, 0, 1, 2, 3 }
]
& J. I3 R- d4 {0 j3 {7 vSimplicial complex
[
    { 0, 1, 2, 3 },
: w. z3 F( Y) ^8 P    { 4, 5, 6, 8 },
& Z7 V/ M! `3 x  x* ]; T    { 4, 5, 7, 8 },
4 a; y) q0 \) e* T& n( z    { 5, 6, 7, 8 },
    { -1, 0, 1, 3 },
# s5 z- O  q2 p# N    { -1, 0, 2, 3 },
    { 4, 5, 6, 7 },
    { 4, 6, 7, 8 },
    { -1, 0, 1, 2 },
    { -1, 1, 2, 3 }
" ~# G: i( n' S! G8 ]]
! z) _/ K8 |* |9 \9 K3 F; h8 L9 j

  N$ Z# _8 u) B6 O1 Q1 Z边界之和是怎样算出的？
    { 4, 5, 6, 7, 8 },
    { -1, 0, 1, 2, 3 }



+ d0 |- c8 ~/ L# t4 J. K9 v