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Here is an ultrafinitist manifesto (link) I have co-written a few years ago:

  http://arxiv.org/pdf/cs/0611100v1
.

It is absolutely not a finished paper (there are a few inaccuracies, and many parts are sloppy), but it contains a brief history of ultrafinitistic ideas from the early greeks all the way to present time, a number of refs, as well as a sketch of a programme towards a model theory and a proof theory of ultrafinitistic mathematics.

You may also want to google the FOM list on "ultrafinitism", there are a few posts by Podnieks, Sazonov, myself, and a few others pro and contra ultrafinitism.
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Here is an ultrafinitist manifesto I have co-written a few years ago:

  http://arxiv.org/pdf/cs/0611100v1.

It is absolutely not a finished paper (there are a few inaccuracies, and many parts are sloppy), but it contains a brief history of ultrafinitistic ideas from the early greeks all the way to present time, a number of refs, as well as a sketch of a programme towards a model theory and a proof theory of ultrafinitistic mathematics.

You may also want to google the FOM list on ultrafinitism, "ultrafinitism", there are a few posts by Podnieks, Sazonov, myself, and a few others pro and contra ultrafinistismultrafinitism.
show/hide this revision's text 1

Here is an ultrafinitist manifesto I have co-written a few years ago:

http://arxiv.org/pdf/cs/0611100v1.

It is absolutely not a finished paper (there are a few inaccuracies, and many parts are sloppy), but it contains a brief history of ultrafinitistic ideas from the greeks all the way to present time, a number of refs, as well as a sketch of a programme towards a model theory and a proof theory of ultrafinitistic mathematics.

You may also want to google the FOM list on ultrafinitism, there are a few posts by Podnieks, Sazonov, myself, and a few others pro and contra ultrafinistism.