Timeline for Characterizing positivity of formal group laws
Current License: CC BY-SA 3.0
12 events
| when toggle format | what | by | license | comment | |
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| Apr 9, 2018 at 22:31 | history | edited | Tom Copeland | CC BY-SA 3.0 |
Some historical content
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| Feb 25, 2018 at 19:51 | comment | added | Tom Copeland | @Jair Taylor, btw, positivity is not necessary for combinatorial interpretations; e.g., recall the Euler formula, see mathoverflow.net/questions/272583/… and the ref to Hope monoids there in my comments, and note interpretations of the Vandermonde determinant. Negative signs seem to point to topological combinatorial interpretations. | |
| Feb 12, 2018 at 19:11 | history | edited | Tom Copeland | CC BY-SA 3.0 |
Proved a conjecture by Majer
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| Feb 9, 2018 at 0:34 | history | edited | Tom Copeland | CC BY-SA 3.0 |
Intro of more amenable characterization.
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| Feb 6, 2018 at 23:46 | history | edited | Tom Copeland | CC BY-SA 3.0 |
Some detail on phi(x) provided.
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| Feb 6, 2018 at 3:00 | history | edited | Tom Copeland | CC BY-SA 3.0 |
Gave a reduced formulation
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| Feb 3, 2018 at 15:33 | comment | added | Tom Copeland | Corrected $x_1=h_0t=t$. | |
| Feb 3, 2018 at 15:30 | history | edited | Tom Copeland | CC BY-SA 3.0 |
Error in a coefficient corrected.
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| Feb 2, 2018 at 16:21 | comment | added | Tom Copeland | The FGL for $\phi(x)=(1+ax)(1+bx)= 1+e_1x+e_2x^2$ is given in the OEIS entry for the Eulerian numbers oeis.org/A008292 in my 2014 formulas. | |
| Feb 2, 2018 at 14:10 | history | edited | Tom Copeland | CC BY-SA 3.0 |
Elaborated on Sage results
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| Feb 2, 2018 at 1:01 | history | edited | Tom Copeland | CC BY-SA 3.0 |
added 13 characters in body
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| Feb 2, 2018 at 0:53 | history | answered | Tom Copeland | CC BY-SA 3.0 |