问个关于复形之和的边界问题

lilianjie

X:=**x(0);
X;
X2:=
, ?2 A1 i5 A7 {" F**x(1);X2;
X3:=**x(2);X3;
* ~5 W# P4 M8 U8 z. J2 t/ A- V/ aX4:=
**x(3);X4;
9 M$ i$ B1 [7 n2 _" ^& eX5:=
% [% C  l7 ]- i( u. u* r( @# U**x(4);X5;


XX:=Normalization(X5) ;
XX;
S:=Shift(XX, -2);
6 X" M. i' g, o' [4 k2 V, m' VS;
* J0 ?/ O! H& SBoundary(X5) ;
( K  k, ]; k9 LBoundary(S) ;
K:=S + X5;K;
/ t; T' b$ A( E  ^" P
Boundary(K) ;

4 s# O3 d: \$ b# c6 n* L- g
Simplicial complex
: I4 Y2 _1 \" k4 t0 _" a) y+ a[
    { 1 }
]

Simplicial complex
[
    { 1, 2 }
  f: g2 G4 Y# v4 U% H- B2 a]
- |3 _. W7 e- ~
( R4 G! \& w2 k! fSimplicial complex
[
    { 1, 2, 3 }
0 b( y4 r  I$ E]

Simplicial complex
  r' Z* B1 _9 E[
! L9 o, w* Q% P$ ~2 h% K    { 1, 2, 3, 4 }
. R; r2 ]! R0 V* @. |- h. z]

Simplicial complex
/ L3 i7 T4 |: j; E5 `+ J8 G[
1 `* [) y( i8 {7 |" r+ [    { 1, 2, 3, 4, 5 }
]
, {: x8 p1 D+ b' @
6 x8 \3 P- x, ~+ c$ J  G; S, KSimplicial complex
[
/ D/ n0 j3 ], Q  D# Q% _* }    { 1, 2, 3, 4, 5 }
]
; a4 ~# X# |# i8 }9 m, q* H  t
& Q3 C0 ?7 K$ _( Q! C& [9 R! ^Simplicial complex
4 q; g. b) t& j* T2 q[
    { -1, 0, 1, 2, 3 }
* W+ |/ S0 l0 A, p- W]
1 h: j: G' e5 z' Y
Simplicial complex
, y. F" }8 z1 d- F9 k, i* h[
    { 1, 2, 4, 5 },
    { 1, 2, 3, 4 },
    { 1, 3, 4, 5 },
8 \: B4 i* l6 r4 I8 n( ^( G    { 1, 2, 3, 5 },
    { 2, 3, 4, 5 }
8 |) O' \% c/ F  e/ v* A1 R]

Simplicial complex
[
# Q6 G: n" a/ M& u: m% E' c8 L% r    { -1, 0, 1, 3 },
0 ^8 n% H, s, E2 g8 ^    { -1, 1, 2, 3 },
    { 0, 1, 2, 3 },
    { -1, 0, 1, 2 },
0 _' ?8 x6 ^4 m' A  F    { -1, 0, 2, 3 }
% E- {/ h" d' d. o' F0 B3 k2 O]
+ n+ K# Q% y( b) y+ t% _
( l7 Y+ v( B- Y# I9 `Simplicial complex
7 M8 c( t, y9 G6 k* @$ T[
    { 4, 5, 6, 7, 8 },
. u2 ^. e& |9 c: {    { -1, 0, 1, 2, 3 }
  ^7 E  i; x7 l; S# P2 G4 N( k, B]
Simplicial complex
[
    { 0, 1, 2, 3 },
    { 4, 5, 6, 8 },
1 i. \' Z3 Y/ ], ]4 [& x+ g    { 4, 5, 7, 8 },
    { 5, 6, 7, 8 },
5 B- F' W) E) U6 h    { -1, 0, 1, 3 },
    { -1, 0, 2, 3 },
    { 4, 5, 6, 7 },
    { 4, 6, 7, 8 },
2 e+ U( H- J+ \! l4 `" t- W5 I    { -1, 0, 1, 2 },
8 c& `1 J9 K, g4 u  q- m5 x    { -1, 1, 2, 3 }
]


& ^3 n1 l6 _: D  T+ \3 J; p边界之和是怎样算出的？
/ o* u0 F6 A: y% S3 x+ n7 V7 Y    { 4, 5, 6, 7, 8 },
5 z( y5 A- r$ U- g9 g    { -1, 0, 1, 2, 3 }


# G: m" Q6 B. a+ V) r