问个关于复形之和的边界问题

lilianjie

X:=**x(0);
X;
& m, Y: Z4 x% x# C9 HX2:=
# O7 l9 p: @) \# J, H, w6 q' ^+ m+ V**x(1);X2;
. r2 W( T' n! o5 h0 cX3:=**x(2);X3;
X4:=
  ~9 r; o% J+ H5 L. B+ |6 |$ h**x(3);X4;
: U. s( V, H# V1 nX5:=
3 k3 s" [$ B9 h: n/ ^  j7 M**x(4);X5;
+ w8 M0 Z& C- s# z% b6 b/ K
* Q$ T  c& J+ w, E# p3 i
XX:=Normalization(X5) ;
9 m/ q, p/ T9 r5 e. eXX;
4 E, t$ O3 A2 y+ O$ ]+ jS:=Shift(XX, -2);
S;
Boundary(X5) ;
Boundary(S) ;
K:=S + X5;K;

& |1 L- B0 k9 X0 zBoundary(K) ;
* x6 |/ ^2 j# F% A( v+ t
) H! ?7 k& v% ]3 _4 n' O
/ P  x# J; x/ n- [Simplicial complex
[
: @! S4 l* H6 q% G& s    { 1 }
]
+ W9 ~, [* G/ b0 }% K
Simplicial complex
[
    { 1, 2 }
' a2 L4 R+ B' \]
: T- q" |  t, [1 ^& C  ~  q# O
Simplicial complex
[
/ `- D4 |9 ^. L    { 1, 2, 3 }
2 |. i$ q) P0 q" `]
( q9 n0 w$ \" H0 o/ B5 |" y
) e* R1 y7 {2 d  q( n4 USimplicial complex
* V3 [6 P% q& {/ ?, C6 w[
    { 1, 2, 3, 4 }
. R0 C6 n0 T; ?" d; G9 f! v]

Simplicial complex
[
    { 1, 2, 3, 4, 5 }
]

Simplicial complex
[
    { 1, 2, 3, 4, 5 }
]
5 [$ y3 j; q3 }
Simplicial complex
[
$ Z8 K3 s- d/ q    { -1, 0, 1, 2, 3 }
, F$ d  A) G. Z9 n]
- W3 v5 @- t8 F1 S  m
Simplicial complex
4 A1 K. Q1 u: z' e) p/ K& n. J' [[
    { 1, 2, 4, 5 },
    { 1, 2, 3, 4 },
    { 1, 3, 4, 5 },
    { 1, 2, 3, 5 },
" y* N. ^& W2 c. m- k/ B    { 2, 3, 4, 5 }
3 Y+ ]/ d) }4 t8 s% K]

Simplicial complex
: |, E  v5 X# L1 e4 c[
1 F  B# d$ T/ _" E    { -1, 0, 1, 3 },
    { -1, 1, 2, 3 },
    { 0, 1, 2, 3 },
    { -1, 0, 1, 2 },
    { -1, 0, 2, 3 }
4 M. E% E+ X  `, S3 H4 i9 v]

, [4 x5 F6 Y3 ?  h' qSimplicial complex
: v3 E: g; o/ D. r" V[
' y# V5 F: G+ O: R* ^4 O) B% P$ j    { 4, 5, 6, 7, 8 },
    { -1, 0, 1, 2, 3 }
]
! q7 o! A, d" j2 U( w8 B) C- ?Simplicial complex
6 L# X( K; U9 J) c[
, T8 H1 M7 C6 `- {    { 0, 1, 2, 3 },
    { 4, 5, 6, 8 },
: T1 o' M' m6 F* D    { 4, 5, 7, 8 },
5 _; ?) A, u/ [    { 5, 6, 7, 8 },
    { -1, 0, 1, 3 },
    { -1, 0, 2, 3 },
    { 4, 5, 6, 7 },
    { 4, 6, 7, 8 },
, N- E* e1 A. A4 X  C( O% O    { -1, 0, 1, 2 },
    { -1, 1, 2, 3 }
]

& X5 h4 x4 S5 Y% L* r. u' Z  D2 |
边界之和是怎样算出的？
    { 4, 5, 6, 7, 8 },
5 R, U2 D# p: t* ^/ E. O5 y! L- G    { -1, 0, 1, 2, 3 }
3 \2 W( L+ t1 }4 |  a
5 d2 A7 M; m: a9 `

. C% x# N# X, g0 _7 c9 D' H6 _" y1 \