EvgenyM's profile - activity

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2024-01-05 14:49:25 +0200	received badge	● Popular Question (source)
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2019-12-05 23:50:40 +0200	asked a question	Equation in complex numbers I need to solve the following equation. `solve(z^2 == (1-sqrt(3)I)z.conjugate(), z)` Sage says `[z == -sqrt((-Isqrt(3) + 1)conjugate(z)), z == sqrt((-Isqrt(3) + 1)conjugate(z))]` I'd like to get solutions in polar form, something like `[z == 0, z == 2e^(piI/9), z == 2e^(7piI/9), z == 2e^(13piI/9)]` Or I'd like to get the absolute values and arguments of the solutions. Is it possible in Sage?
2019-01-25 20:03:29 +0200	commented answer	Binary relations I accepted your answer to this question, but I cannot believe something studied in every first year Discrete Math course is not a part of Sage.
2019-01-21 10:13:42 +0200	received badge	● Good Question (source)
2019-01-17 15:35:16 +0200	received badge	● Nice Question (source)
2019-01-17 13:24:56 +0200	asked a question	Binary relations Are finite binary relations as subsets of Cartesian product implemented in Sage? I am interested in taking set-theoretic operations, finding composition and inverse, checking properties such as reflexivity and antisymmetry. I found a report here, but I am not sure if it made its way into version 8.5. If so, is there documentation and examples? By doing `search_src("binaryrelation")` I also found functions `IsBinaryRelation`, `IsReflexiveBinaryRelation`, etc. in `libs/gap/gap_functions.py`, but I am not sure how to use them.
2019-01-09 21:06:51 +0200	received badge	● Scholar (source)
2019-01-09 21:04:40 +0200	commented answer	How to format posts on this forum? Thanks. Is there a way to see how other people typed their posts? For now at least I don't have the "edit" button under your post, for example.
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2019-01-08 23:10:24 +0200	received badge	● Student (source)
2019-01-08 23:05:50 +0200	asked a question	How to format posts on this forum? Is there a description of features used to format posts on this forum? Does it use Markdown? In particular, I am interested in rules for typing logs of interaction with Sage.
2019-01-08 23:05:49 +0200	asked a question	Quadratic equation with complex coefficients How can I solve `x^2 - (1 + I)x + 6 + 3I == 0` to get answers `z = 3I` and `z = 1 - 2I` ? When I enter `solve(x^2 - (1 + I)x + 6 + 3I == 0, x)` I get `[x == -1/2sqrt(-10I - 24) + 1/2I + 1/2, x == 1/2sqrt(-10I - 24) + 1/2I + 1/2]`