Timeline for How sparse can a matrix mapping between sparse vectors be?
Current License: CC BY-SA 4.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Mar 22, 2022 at 9:27 | comment | added | ABIM | Great! Thanks Bastian | |
| Mar 22, 2022 at 9:26 | vote | accept | ABIM | ||
| Mar 22, 2022 at 9:25 | comment | added | Bastian Seifert | I clarified the answer a bit. | |
| Mar 22, 2022 at 9:25 | history | edited | Bastian Seifert | CC BY-SA 4.0 |
added 124 characters in body
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| Mar 22, 2022 at 9:24 | comment | added | Bastian Seifert | When $v_i = 0$ then $A_{i,j} = 0$. We can use an arbitrary $u_j \not= 0$ to find such a matrix. If all $u_j = 0$ then this system has a solution only if also all $v_i = 0$. | |
| Mar 22, 2022 at 9:05 | comment | added | ABIM | Sorry I'm abit confused, what is $A_{i,j}$ when $u_j=0$ or $v_i=0$? | |
| Mar 22, 2022 at 8:59 | history | answered | Bastian Seifert | CC BY-SA 4.0 |