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• CommentRowNumber1.
• CommentAuthorDavid_Corfield
• CommentTimeMay 10th 2012

A stub for M-theory. What’s supposed to be so mysterious about it? Is it that people don’t even know what form it would take?

• CommentRowNumber2.
• CommentAuthorUrs
• CommentTimeMay 10th 2012

Yes, that’s the problem. What one has is this incomplete diagram

$\array{ ??? &\stackrel{effective QFT}{\to}& 11d Supergravity \\ \downarrow && \downarrow^{\mathrlap{dimensional reduction}} \\ StringTheory &\stackrel{effective QFT}{\to}& 10d Supergravity }$

and some indications that indeed there is a way to complete it, because some facets of the bottom left and top right entry do seem to come from a common source in the top left.

But beyond these indications, there has never been much actual progress with actually completing the diagram. Most articles that mention the word “M-theory” refer essentially to the top right item.

• CommentRowNumber3.
• CommentAuthorUrs
• CommentTimeMay 10th 2012

I have expanded the entry a bit. Needless to say, this is not doing the topic justice yet. But is maybe a start.

• CommentRowNumber4.
• CommentAuthorUrs
• CommentTimeMay 26th 2013

added some more pointers to references at M-theory

• CommentRowNumber5.
• CommentAuthorUrs
• CommentTimeSep 11th 2013
• (edited Sep 11th 2013)

added to the References a pointer to the conference talk video where Witten announces the strong coupling conjecture

(Thanks to Cliff Harvey! I still need to find the precise referencing data.)

• CommentRowNumber6.
• CommentAuthorUrs
• CommentTimeSep 11th 2013

added pointers to the D0-brane condensation story both to M-theory as well as to D0-brane.