Physics and mathematics in public

A life online · Alejandro Rivero

Research also happened in comments and conversations. These entries follow exchanges outside my own sites, alongside the forum and Usenet material in the chronology.

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String theory before the blog debates

2001-02-21 · Original Usenet reply

In the sci.physics.research thread “What's wrong with string theory?”, I point readers to Peter Woit's newly posted String Theory: An Evaluation on the University of Zaragoza arXiv mirror. This predates the later conversations on physics blogs.

The String Coffee Table

2004-03 and 2004-07 · Discussion and reference

Urs Schreiber's Before the flood refers to our discussion of spectral noncommutative geometry and strings. A later Strings 04 thread contains my exchange with him about the conference and twistor strings.

Anthropic arguments at Not Even Wrong

2004-05-28 · Original comment

A comment distinguishing empirical input from theoretical deductions in discussions of the anthropic principle.

Research outside academia, finance and divergences

2004-06 · Original comments

A conversation at Peter Woit's blog about solitary research, work in finance, and my earlier note on divergences.

Anthropism and empiricism at Musings

2004-06-19 · Original comment

The same distinction between observation and principle appears in my contribution to Jacques Distler's High Energy Supersymmetry discussion.

Koide leptons: I am astonished

2005-04 · Original thread

A readable Google Groups thread preserves the original reaction to the lepton-mass relation, followed by a link to my short memorandum. This adds the actual Usenet discussion alongside the later preprint.

A mystery behind the Z width

2006-09-14 · Guest research and discussion

Tommaso Dorigo presents my decay-width plot and the discussion continues in the comments. A follow-up credited to me gives the PDG data and gnuplot steps needed to reproduce it, including a units correction in the data.

The E8 discussion and recovering known limits

2007-11-16 · Original comment

In the Physics Forums discussion of An Exceptionally Simple Theory of Everything, I ask what survives when physical constants and classical limits are restored.

How to start reading noncommutative geometry

2009-11-18 · Original reply

A Physics Forums reply points to my old chronology of the subject and suggests beginning with the relationship between a commutative algebra and a manifold.