Timeline for Normal forms for homogeneous cubic polynomials in $\mathbb{R}[x_1, x_2, x_3]$
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
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| May 6, 2013 at 10:59 | comment | added | Robert Bryant | You're welcome Jeanne. Probably, I should have mentioned that the reason for choosing the symmetric normal form for nonsingular cubics as I did above (rather than the more common Weierstrass normal form) is that this normal form displays the fact that the projective symmetry group of a (real) nonsingular planar cubic curve is the symmetric group on $3$ letters. This fact is not so obvious in the Weierstrass normal form. | |
| May 5, 2013 at 3:03 | vote | accept | Jeanne Clelland | ||
| May 3, 2013 at 8:54 | history | edited | Robert Bryant | CC BY-SA 3.0 |
replaced 'collinear' with 'concurrent'
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| May 3, 2013 at 1:04 | history | edited | Robert Bryant | CC BY-SA 3.0 |
fixed the classification for three lines
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| May 2, 2013 at 20:54 | history | edited | Robert Bryant | CC BY-SA 3.0 |
added a remark about the 'orbit space'
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| May 2, 2013 at 20:40 | history | edited | Robert Bryant | CC BY-SA 3.0 |
fixed some grammar and formatting problems
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| May 2, 2013 at 11:20 | history | answered | Robert Bryant | CC BY-SA 3.0 |