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- From: tao@fine.princeton.edu (Terry Tao)
- Subject: Assorted questions and problems
- Message-ID: <1992Nov8.181631.13298@Princeton.EDU>
- Sender: news@Princeton.EDU (USENET News System)
- Nntp-Posting-Host: math.princeton.edu
- Organization: Princeton University
- References: <BxDJ8v.DCw@world.std.com>
- Date: Sun, 8 Nov 1992 18:16:31 GMT
- Lines: 21
-
- I have three questions that I can't do. I hope you can see from the
- diversity of them that they are not homework.
-
- (1) what is the current status of the Bieberbach conjecture, that any
- univalent holomorphic function f on the unit disk such that f(0) = 0 and
- f'(0) = 1 satisfies the fact that the taylor expansion f(x) = \sum a_n x^n
- has the property |a_n| \leq n? The last I heard, it was proved for n up to
- 7 only, and also for all n sufficiently large |a_n| \leq 1.08 n.
-
- (2) Suppose X and Y are Banach spaces. Can one construct a linear mapping
- from X to Y which is NOT continous?e.g. a map from L^2 to L^2 which is not
- bounded. Is it possible to construct one without AC?
-
- (3) Assume the axiom of choice and the axiom of the continuum. Is it true that two chains (totally ordered sets) which
- both have the cardinality of the continuum have a one-to-one and onto order
- preserving mapping betweem them?
-
- please answer by email.
-
- Terry
-
-