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arrow31.mp
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arrow31.mp
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% tex/conc/mp/arrow31.mp 2012-4-9 Alan U. Kennington.
% $Id: tex/conc/mp/arrow31.mp 5b6714084a 2012-04-09 06:26:46Z Alan U. Kennington $
% Mixed tensor product spaces isomorphism.
input mapmax.mp
verbatimtex
\input akmath
etex
% - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
beginfig(1);
path pat[];
pair w[];
aa := 3.3cm;
bb := 1.2cm;
cc := 0.68cm;
ddA := 0.4cm;
ddB := 0.3cm;
ee := 1.4cm;
ffA := 1.15cm;
ffB := 0.6cm;
qqa := 0.38cm;
qqb := 0.25cm;
qqc := 0.20cm;
qqd := 0.50cm;
da := 3.0cm;
db := da + 2ee + 30pt;
dc := 1.35cm;
gg := cc + 0.5dc;
penA := 0.5bp; % Pen scale for markings.
penB := 0.5bp; % Pen scale for boxes.
sizeA := 3pt;
de := 12pt;
df := de + 12pt;
dg := 13pt;
w0 := (0,0);
w1 := w0 + (0,bb);
w2 := w0 + (da,0);
w3 := w2 + (0,bb);
w10 := 0.5[w0+(cc,-ddA),w1+(cc,ddB)]; % Right of left box.
w11 := 0.5[w2+(-cc,-ddA),w3+(-cc,ddB)]; % Left of right box.
w20 := w0 + (db,0);
w21 := w20 + (0.5dc,bb);
w22 := w20 + (dc,0);
w23 := w22 + (0,bb);
w24 := (xpart(w21),ypart(w20));
%==============================================================================
% Multilinear maps from the V-spaces to K.
label(btex
\strut$\displaystyle\mathop{\times}\limits_{\alpha\in A}V_\alpha$ etex, w0);
label(btex \strut$K$ etex, w1);
pickup pencircle scaled penA;
S_arrowspaces(w0, w1, qqa, qqb, 1, black);
S_erd(w0, w1, qqa, qqb, 3, 0, black, black, sizeA, sizeA, penA, penA);
label.bot(btex \strut$\mlin((V_\alpha)_{\alpha\in A};K)$ etex, w0+(0,-ddA));
% label.bot(btex \strut over a set etex, w1+(0,-df));
pickup pencircle scaled penB;
pat1 := (w0+(-cc,-ddA))--(w0+(cc,-ddA))--(w1+(cc,ddB))--(w1+(-cc,ddB))--cycle;
draw pat1;
% - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
% Multilinear maps from the W-spaces to K.
label(btex
\strut$\displaystyle\mathop{\times}\limits_{\beta\in B}W_\beta$ etex, w2);
label(btex \strut$K$ etex, w3);
pickup pencircle scaled penA;
S_arrowspaces(w2, w3, qqa, qqb, 1, black);
S_erd(w2, w3, qqa, qqb, 3, 0, black, black, sizeA, sizeA, penA, penA);
label.bot(btex \strut$\mlin((W_\beta)_{\beta\in B};K)$ etex, w2+(0,-ddA));
% label.bot(btex \strut over a set etex, w1+(0,-df));
pickup pencircle scaled penB;
pat2 := (w2+(-cc,-ddA))--(w2+(cc,-ddA))--(w3+(cc,ddB))--(w3+(-cc,ddB))--cycle;
draw pat2;
% - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
pickup pencircle scaled penA;
S_arrowspaces(w10, w11, qqc, qqc, 1, black);
S_erd(w10, w11, qqc, qqc, 1, 0, black, black, sizeA, sizeA, penA, penA);
% - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
pickup pencircle scaled penB;
pat3 := (w0+(-ee,-ffA))--(w2+(ee,-ffA))--(w3+(ee,ffB))--(w1+(-ee,ffB))--cycle;
draw pat3;
label.bot(btex
\strut$\Lin(\mlin((V_\alpha)_{\alpha\in A};K),\mlin((W_\beta)_{\beta\in B};K))$
etex,
0.5[w0,w2]+(0,-ffA));
label.bot(btex
\strut$=\botimesr((V_\alpha)_{\alpha\in A};\,(W_\beta)_{\beta\in B})$ etex,
0.5[w0,w2]+(0,-ffA-dg));
%==============================================================================
% The second space on the right: "mixed multilinear function space".
% Multilinear maps from the V-spaces to K.
label(btex
\strut$\displaystyle\mathop{\times}\limits_{\alpha\in A}V_\alpha^*$ etex, w20);
label(btex \strut$K$ etex, w21);
pickup pencircle scaled penA;
S_arrowspaces(w20, w21, qqd, qqb, 1, black);
S_erd(w20, w21, qqd, qqb, 3, 0, black, black, sizeA, sizeA, penA, penA);
label.bot(btex
\strut$\mlin((V_\alpha^*)_{\alpha\in A},(W_\beta)_{\beta\in B};K)$ etex,
w24+(0,-ddA));
% label.bot(btex \strut over a set etex, w21+(0,-df));
pickup pencircle scaled penB;
pat21 :=
(w24+(-gg,-ddA))--(w24+(gg,-ddA))--(w21+(gg,ddB))--(w21+(-gg,ddB))--cycle;
draw pat21;
% - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
% Multilinear maps from the W-spaces to K.
label(btex
\strut$\displaystyle\mathop{\times}\limits_{\beta\in B}W_\beta$ etex, w22);
pickup pencircle scaled penA;
S_arrowspaces(w22, w21, qqd, qqb, 1, black);
S_erd(w22, w21, qqd, qqb, 3, 0, black, black, sizeA, sizeA, penA, penA);
% - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
% Arrow from left box to right box.
w30 := 0.5[w2+(ee,-ffA),w3+(ee,ffB)];
w31 := w21 + (-gg,ddB);
w32 := (xpart(w30),ypart(w10));
w33 := (xpart(w31),ypart(w10));
pickup pencircle scaled penA;
S_arrowspaces(w32, w33, qqc, qqc, 1, black);
% S_erd(w32, w33, qqc, qqc, 1, 0, black, black, sizeA, sizeA, penA, penA);
label.top(btex \strut$\rho$ etex, 0.5[w32,w33]);
endfig;
end