问个关于复形之和的边界问题

lilianjie

X:=**x(0);
X;
X2:=
: P" i9 v; T% q; H, L# ^**x(1);X2;
  K0 L/ |  f0 ]% E) x: I: lX3:=**x(2);X3;
# g1 m5 F. J6 v8 j8 G4 AX4:=
**x(3);X4;
X5:=
**x(4);X5;

* u9 [  B; r+ _
( K+ k" ?. a; k# zXX:=Normalization(X5) ;
XX;
+ f! u% j0 z( ^! |. iS:=Shift(XX, -2);
( x" w. r  k2 Q: c& y- c% ^! SS;
Boundary(X5) ;
+ F# C9 b+ \) ^1 i0 kBoundary(S) ;
& Z6 ^3 V4 x' N% e+ k2 A, Y! GK:=S + X5;K;

* c0 ]+ G1 A( ^2 cBoundary(K) ;

. F- j3 z. P* m( M
$ N! u9 l% a; ^% x( OSimplicial complex
[
    { 1 }
3 a5 M2 b" P4 i6 }' a9 C]

2 P# c6 p; l* vSimplicial complex
$ H1 ^" w& G- j. I" k# Y* d9 b) F[
0 q" \7 d$ r6 r( T/ ]  ^( t    { 1, 2 }
# A; l* {; P: Q4 b% K]

Simplicial complex
+ V: q1 N' f; y- S5 ?0 D& t[
. P! i* y8 [' }( S. D2 M) K    { 1, 2, 3 }
]
4 Z/ a# {+ z0 b# i4 ?7 ?
Simplicial complex
[
3 Z( e/ L  w* R/ d7 q( K4 C0 ?    { 1, 2, 3, 4 }
]

Simplicial complex
[
    { 1, 2, 3, 4, 5 }
]
3 f: v3 {( N& A* ~. ~4 \* O3 B
; B! t, R+ ]6 k; h. y, R& JSimplicial complex
[
. o$ l7 g: g7 \' j' U# M9 h    { 1, 2, 3, 4, 5 }
: \  f+ O( n  A4 @3 o]
/ v/ Q& X/ F. s' i5 ~0 V7 s
% Z' F, Q3 j. X5 cSimplicial complex
[
    { -1, 0, 1, 2, 3 }
]

) B; u, j$ |! W! e0 Y. e1 {& p, YSimplicial complex
+ L* e) D) g) ~6 K# z( V# x[
* H7 [* x* \  F4 L+ Q: u: n    { 1, 2, 4, 5 },
    { 1, 2, 3, 4 },
    { 1, 3, 4, 5 },
    { 1, 2, 3, 5 },
( v4 X) A4 p% |) K; n$ g    { 2, 3, 4, 5 }
+ m+ _3 H/ J) D/ A2 c( ]* U4 v]
( W9 x# b* e/ }# i$ [" i' D
4 Q0 V7 c( g% N5 G& J8 xSimplicial complex
# B+ X( T2 ]! ~9 ~; }' N# K[
- M7 M1 S$ t$ Y    { -1, 0, 1, 3 },
' X4 E( p: }" F    { -1, 1, 2, 3 },
3 a! p9 J+ a6 A2 g$ }    { 0, 1, 2, 3 },
    { -1, 0, 1, 2 },
8 Y6 c- C: ?# K- r* G/ j    { -1, 0, 2, 3 }
1 G7 P, F1 J; i7 u4 q, z]
. |+ p. B' D* |( l
Simplicial complex
1 k, f4 t! Z$ T- h/ u[
: |# r) K, h( X1 M6 j' E$ b5 J    { 4, 5, 6, 7, 8 },
    { -1, 0, 1, 2, 3 }
]
4 g& ]) o% T: b$ D! w6 B. o3 HSimplicial complex
6 F4 b1 J8 D% @9 `% t[
    { 0, 1, 2, 3 },
# }3 k+ d. V8 A    { 4, 5, 6, 8 },
* \9 |/ K" A% c5 i7 _    { 4, 5, 7, 8 },
/ r( W  ~' P! s2 x5 X/ B    { 5, 6, 7, 8 },
! E( a) d$ b% s: \    { -1, 0, 1, 3 },
    { -1, 0, 2, 3 },
    { 4, 5, 6, 7 },
    { 4, 6, 7, 8 },
    { -1, 0, 1, 2 },
    { -1, 1, 2, 3 }
]


5 A" X8 S$ B) i5 b( j1 x2 v边界之和是怎样算出的？
* O- d. P& k' e: \) ~, _" U    { 4, 5, 6, 7, 8 },
    { -1, 0, 1, 2, 3 }

" q! I, v4 p$ `& y$ h