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A<br />
=<br />
la descomposición U S V T<br />
{ u | u | K|<br />
u }<br />
1<br />
2<br />
r<br />
⎡<br />
⎢<br />
⎢<br />
⎢<br />
⎢<br />
⎣<br />
σ<br />
1<br />
0<br />
0<br />
0<br />
σ<br />
O<br />
σr<br />
σ 1 ≥σ 2 ≥ ... ≥ σ r >0<br />
0<br />
2<br />
0<br />
0<br />
0<br />
0<br />
0<br />
0<br />
0<br />
0<br />
⎤<br />
⎥<br />
⎥<br />
⎥<br />
⎥<br />
⎦<br />
⎧<br />
⎪<br />
⎨<br />
⎪<br />
⎪⎩<br />
v<br />
v<br />
v<br />
T<br />
1<br />
T<br />
2<br />
M<br />
T<br />
r<br />
⎫<br />
⎪<br />
⎬<br />
⎪<br />
⎪⎭