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    • CommentRowNumber1.
    • CommentAuthorzskoda
    • CommentTimeJan 3rd 2014
    • (edited Jan 3rd 2014)

    I have created dual basis in the natural generality of projective modules. The corresponding redirects removed from dual vector space entry whose dual basis definition is absorbed in a remark here (without changes to the original).

  1. The sentence “In particular, x i *(x j)=δ i jx_i^*(x_j) = \delta_i^j (Kronecker delta)” is incorrect: there may be relations between the x jx_j’s, e.g. x 2=3x 1x_2=3x_1, then apply x 2 *x_2^* to the two sides we will get 1=30=01=3\cdot 0=0, impossible.

    Peng DU

    diff, v5, current

  2. Fixed a small typo and added a sentence.

    diff, v6, current

    • CommentRowNumber4.
    • CommentAuthorTodd_Trimble
    • CommentTimeMar 6th 2019

    Well, that’s not the only thing wrong in the paragraph mentioned by Deng PU. I’ll have a look later to see what can be salvaged.

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