Timeline for Surreal Numbers, Proving $x1=x$
Current License: CC BY-SA 3.0
12 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| May 4, 2018 at 18:02 | vote | accept | Nikolai Opdan | ||
| May 4, 2018 at 18:02 | vote | accept | Nikolai Opdan | ||
| May 4, 2018 at 18:02 | |||||
| Apr 29, 2018 at 17:07 | comment | added | Noah Schweber | @JoelDavidHamkins That's a fair point. | |
| Apr 29, 2018 at 16:32 | comment | added | Gerald Edgar | For interesting reading, including adventures in proving the basic properties of the surreals, see Knuth's little book Surreal Numbers. | |
| Apr 29, 2018 at 15:25 | comment | added | Joel David Hamkins | My opinion is that basically any serious question about the surreal numbers is fine on MathOverflow. Furthermore, I admire any student who tries to go through the development of the surreals from first principles, and MO is a good resource for such a student to get help. I once ran an intersession graduate seminar at the University of Amsterdam developing this theory from the ground up, and those students faced similar questions to this one at the beginning. | |
| Apr 29, 2018 at 13:47 | review | Close votes | |||
| Apr 30, 2018 at 7:45 | |||||
| Apr 29, 2018 at 13:32 | answer | added | Joel David Hamkins | timeline score: 15 | |
| Apr 29, 2018 at 13:30 | comment | added | Nikolai Opdan | I understand that all the terms involving $\emptyset$ and 0 does not contribute any representatives to the product, but there are still the four terms $X_L1, X_R1, X_L1, X_R1$ which I am questioning. I can't get rid of the extra $X_R1$ on the left side and $X_L1$ on the left side. | |
| Apr 29, 2018 at 13:25 | comment | added | Joel David Hamkins | The empty set has no elements in it, and so the terms in your expression involving $\emptyset$ do not contribute any representatives to the product $x1$. | |
| Apr 29, 2018 at 13:19 | history | edited | Qfwfq | CC BY-SA 3.0 |
edited title
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| Apr 29, 2018 at 13:07 | review | First posts | |||
| Apr 29, 2018 at 13:22 | |||||
| Apr 29, 2018 at 13:05 | history | asked | Nikolai Opdan | CC BY-SA 3.0 |