问个关于复形之和的边界问题

lilianjie

X:=**x(0);
) F8 U# O' H. f5 N- B1 Z% CX;
" Q4 V% f6 t, ^" I" k! X. qX2:=
**x(1);X2;
X3:=**x(2);X3;
X4:=
**x(3);X4;
X5:=
8 N. [5 K+ m% a( x' g. `, R, I: ^**x(4);X5;
$ Q/ d' i3 S* `8 d9 s; J* i# |
) Z: O8 J8 \; o: O# C8 C
3 G/ B5 o8 A) k$ }. O' Y4 ^2 \XX:=Normalization(X5) ;
XX;
S:=Shift(XX, -2);
# [* ?; V$ W' {5 M6 H/ E7 US;
Boundary(X5) ;
$ Y' V. q1 ~5 A5 B9 _Boundary(S) ;
K:=S + X5;K;

Boundary(K) ;


& V4 q5 ^4 E# F$ l' {; c6 QSimplicial complex
[
    { 1 }
]

Simplicial complex
8 L# [; O- G8 e* o. \[
    { 1, 2 }
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: p  _% E# ^( b( y$ }! {
2 G7 P6 ?$ F* dSimplicial complex
  O1 @& \+ a4 S$ a[
    { 1, 2, 3 }
]

8 i( P1 o. `2 C2 \* c) xSimplicial complex
[
    { 1, 2, 3, 4 }
]

Simplicial complex
[
    { 1, 2, 3, 4, 5 }
( V& s. l8 n3 H, Z, T]
4 ], r( x2 o% l" E0 _- W
Simplicial complex
2 x6 T8 g( z; r; Q/ K* g) E[
6 D+ W. U' L& v2 N) K$ h    { 1, 2, 3, 4, 5 }
]

Simplicial complex
+ q" h2 q: m: |' \[
$ l" y( M, X/ S  |5 |    { -1, 0, 1, 2, 3 }
+ ]: w. A$ e4 I" w* g5 b) N]
/ y. N' v/ P1 a: r' i
; n& |9 v5 \* s7 `7 E5 K2 C* hSimplicial complex
[
! y& q, x2 _5 Y4 ~( _. [7 x; s. T    { 1, 2, 4, 5 },
0 J% O& X, r7 T" a8 F; y" `& c    { 1, 2, 3, 4 },
    { 1, 3, 4, 5 },
4 _& X0 m, H" A. P    { 1, 2, 3, 5 },
* R* t5 e# j) j    { 2, 3, 4, 5 }
; N# z5 C( m( M4 N* R]
  u% d( N8 y, ~) \/ l, Z0 ~% J
1 G1 G6 A/ P% O" O. o& v8 W' ]# ]Simplicial complex
: o& y/ f7 {+ v' V1 s[
    { -1, 0, 1, 3 },
. d; e) P: S. b/ |    { -1, 1, 2, 3 },
    { 0, 1, 2, 3 },
3 y$ x8 t7 o3 k& N* f  a    { -1, 0, 1, 2 },
; d' E9 V7 @' Q  v    { -1, 0, 2, 3 }
]

4 q' y) n$ d: ]" T& y* w% Y* wSimplicial complex
* N. d' z7 a; D7 G[
    { 4, 5, 6, 7, 8 },
) I* f$ Y1 U: H$ f: |4 i& b    { -1, 0, 1, 2, 3 }
1 R3 Z( [# r6 i; L# ~  ?]
Simplicial complex
[
' M8 R% p1 F: G    { 0, 1, 2, 3 },
# K, {8 o- O8 d. Q0 H2 ^! _. v    { 4, 5, 6, 8 },
" t2 o6 R+ v; {! n# Q    { 4, 5, 7, 8 },
    { 5, 6, 7, 8 },
    { -1, 0, 1, 3 },
# f- v- m) T' Y3 R3 J7 W    { -1, 0, 2, 3 },
    { 4, 5, 6, 7 },
5 i/ c( P; j5 ?, N  Y1 \4 K    { 4, 6, 7, 8 },
  B! f9 y5 B* d7 i6 f# y3 z8 h    { -1, 0, 1, 2 },
+ Z/ F% c# c8 R    { -1, 1, 2, 3 }
]

7 a! B+ }: W' k
+ z! W' n5 \4 @6 V& b+ F2 ]' S边界之和是怎样算出的？
7 Q9 a' J/ p5 p! o  m/ M" M( ?3 ~- c    { 4, 5, 6, 7, 8 },
    { -1, 0, 1, 2, 3 }

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