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The F-norm of identity matrix is bigger than 1. Thus it's even looser than what wuyongjun said

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6Â¥2015-10-14 05:30:53
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4Â¥2015-10-13 21:37:19
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4Â¥: Originally posted by wurongjun at 2015-10-13 21:37:19
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7Â¥2015-10-14 17:24:17
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