Recent content by siucw

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    Graduate Prove A' is the Generalized Inverse of A When A'A is Idempotent

    so, you can prove it conceptually: since AA' is a projection, AA'A is projecting A to a space which include AA', then...? is there any way to show it equationally?
  2. S

    Graduate Prove A' is the Generalized Inverse of A When A'A is Idempotent

    it is a subspace of A
  3. S

    Graduate Prove A' is the Generalized Inverse of A When A'A is Idempotent

    rank A'A is equal to rank A
  4. S

    Graduate Prove A' is the Generalized Inverse of A When A'A is Idempotent

    AA-A=A,A- is generalized inverse, and no assumption about full rank or not for A
  5. S

    Graduate Prove A' is the Generalized Inverse of A When A'A is Idempotent

    A' is transpose of A, A'A idempotent should mean A'AA'A=A'A, right?
  6. S

    Graduate Prove A' is the Generalized Inverse of A When A'A is Idempotent

    generalized inverse of A is equal to A' if A'A is idempotent?