问个关于复形之和的边界问题

lilianjie

X:=**x(0);
5 h% r* f: a" Z6 R$ gX;
X2:=
**x(1);X2;
+ w/ J* X' E9 M& U  P. @  C$ OX3:=**x(2);X3;
1 D! `6 W$ e1 j4 R& rX4:=
4 i0 x, H' R# \* E0 b**x(3);X4;
5 e( E+ F, x7 m7 |+ @; AX5:=
0 v9 k2 Z; i4 I9 I; N; T**x(4);X5;

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. G' b  p* j) K6 c6 G) MXX:=Normalization(X5) ;
' [7 W" L6 f+ b' ]4 ~+ B3 w7 k* d8 mXX;
S:=Shift(XX, -2);
S;
Boundary(X5) ;
Boundary(S) ;
K:=S + X5;K;

1 n. @6 {! S9 h7 r9 _5 W/ [Boundary(K) ;
9 }4 m* s, B9 r, {0 y
2 Y" U) x: \* U, B6 X' a
4 d+ L' J; _$ v, |' E5 r/ eSimplicial complex
[
: K  Q4 G7 ?) W/ I" k: ^/ f$ u- \    { 1 }
2 q3 C" D4 C3 p- v( s]

7 ^  b/ U" D* y( a; ]; oSimplicial complex
[
7 D) g% |/ t4 Z) ]    { 1, 2 }
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4 n+ K2 O6 q7 C6 h8 ]3 w# A, J; J% |( R
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    { 1, 2, 3 }
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. d  e3 T. B: z6 e[
. g2 O) Z5 h1 A    { 1, 2, 3, 4 }
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! x- }7 B7 R$ |% a9 j" p% m
Simplicial complex
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    { 1, 2, 3, 4, 5 }
2 _+ r' W' s: K8 y6 j; {0 i9 `]
. d" F/ J2 B" S  y4 B% @0 p' g
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    { 1, 2, 3, 4, 5 }
6 K% F, [7 r  ~% N1 g; T]

Simplicial complex
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# P2 I; N4 k: q8 g3 u/ b4 J" m    { -1, 0, 1, 2, 3 }
]

+ G* ]" K$ r) [* gSimplicial complex
1 q$ z) V9 `$ W; ~; b) {[
: N  A- C0 v0 O8 a0 C2 F; P0 j    { 1, 2, 4, 5 },
( M9 Y( L& p. D( w6 d. d    { 1, 2, 3, 4 },
/ q) p) m+ R. W; _+ m, o$ ~    { 1, 3, 4, 5 },
    { 1, 2, 3, 5 },
5 S% q0 X  G+ Z8 v% |$ h    { 2, 3, 4, 5 }
6 x( Z: \5 n7 T]

Simplicial complex
& Y8 p5 i" }' R( |+ L[
    { -1, 0, 1, 3 },
7 ~. Q; O- F( D1 m4 o0 Z    { -1, 1, 2, 3 },
, G: F) z% {9 O3 {- {( z    { 0, 1, 2, 3 },
$ B* b; c4 d1 B- K7 o    { -1, 0, 1, 2 },
    { -1, 0, 2, 3 }
]

! H7 t0 U# }1 _9 z4 sSimplicial complex
* W; r# c: Q: K* H% q[
    { 4, 5, 6, 7, 8 },
    { -1, 0, 1, 2, 3 }
* V8 q3 `/ ~, m) F5 J' L]
Simplicial complex
[
    { 0, 1, 2, 3 },
/ V0 L: T  Y' ~    { 4, 5, 6, 8 },
    { 4, 5, 7, 8 },
5 d, d' h( Q( y! i    { 5, 6, 7, 8 },
) j% e8 Z8 P: p  u& y$ j# A    { -1, 0, 1, 3 },
    { -1, 0, 2, 3 },
    { 4, 5, 6, 7 },
3 S# A7 E; c" Q5 W    { 4, 6, 7, 8 },
    { -1, 0, 1, 2 },
- q% Q) K+ G# o" I/ r' D    { -1, 1, 2, 3 }
% f3 d  t$ C0 j% ~7 j; ~1 C4 a: ~/ d]
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! n& I' `/ p& a& R
0 \9 \! n1 y# [6 P5 f边界之和是怎样算出的？
    { 4, 5, 6, 7, 8 },
% F! U0 u: M3 ~; f) G! V- [! x    { -1, 0, 1, 2, 3 }
4 i, Z* f/ D9 ]' o" A7 C; R

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