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2023-08-21 04:07:01 +0200 | commented answer | Why solve function can't solve system which can be solved manually I'm sorry, but I'm a bit confused by what you're saying. I manually derived that formula, and it appears to be the corre |
2023-08-21 04:02:04 +0200 | marked best answer | Why solve function can't solve system which can be solved manually This returns an empty list: Output: But it can be solved manually Output: Why |
2023-08-21 04:02:00 +0200 | answered a question | Why solve function can't solve system which can be solved manually This system of equations is based on electronic circuit. Seems 'solve' works fine if asked to find all unknown values: ( |
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2023-08-07 04:22:12 +0200 | edited question | Why solve function can't solve system which can be solved manually Why solve function can't solve system of which can be solved This returns nothing reset(); var('i_B10 i_B6 i_B11 i_C10 |
2023-08-07 04:21:59 +0200 | asked a question | Why solve function can't solve system which can be solved manually Why solve function can't solve system of which can be solved This returns nothing reset(); var('i_B10 i_B6 i_B11 i_C10 |
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2014-06-29 03:14:53 +0200 | marked best answer | Make sage to don't open brackets while solving equation Hi, I have an equation ... and when I do get answer Next I need to find pole of X (z that gives denominator==0). But sagemath opened the brackets in denominator it's very bad. Here numerator have only 3rd power, but if it will be bigger, sagemath (i think) give me no solution. When I do prevision commands using pen and paper I get in denominator how to get it with sagemath? (sorry for bad eng.) |
2014-06-29 03:14:53 +0200 | marked best answer | Replace part of expression Hi, I've got an expression (its result of D-transform - discrete laplace transform - don't know details, me bad in math) I need to replace e^(T*p) by z How can i do that ? Thanks! |
2014-06-29 03:14:52 +0200 | marked best answer | Sage notebook with secure connection I am using next command line to run sage notebook but, notebook tell me that I am crazy and someone can get access to my account (really I haven't important data in sage account). If I try to run with secure=True - sage ask me for a domain name, I type it (or just think that it was it) and get no warning about insecure mode, but, also - no access to sage notebook from world or from localhost. I really need to run with secure=True ? If yes - then how to get working web interface ? |
2014-06-29 03:14:50 +0200 | marked best answer | arctan of infinity is undefined Using the following code for an equation, I get an undefined result for What is wrong? |
2014-06-29 03:14:49 +0200 | marked best answer | Additional conditions for expression Hi (sorry for bad eng.), i have next code but last string gives loooooong result, because sagemath don't knows that K1, T1, T2 and omega are real, how to "tell" that to sagemath ? |
2014-06-29 03:14:49 +0200 | marked best answer | Inaccurate numerical result for roots of square equation Hi,I have 'Sage Version 4.6.1, Release Date: 2011-01-11' and I using next code to get roots of square equation: This way give very bad accuracy of the 1st root (Result1=-0.00138422288000584). What i do wrong? And How to get precision result with Sage? Thanks! |
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2013-04-29 19:33:52 +0200 | marked best answer | Get variants of complex cube-root Fist, when you write you define an element of the So it is better to work on Now, if and check |
2013-04-25 15:31:30 +0200 | asked a question | Get variants of complex cube-root I found-out that complex cube-root can have 3 variants (see http://en.wikipedia.org/wiki/Cube_root) But if I try in SageMath to do SageMath return (-1)^(1/3). When I try SageMath gives me numerical approximation of the one root (not real)... How I can get all variants of complex cube-root without numerical approximation? Thanks! P.S. Sorry for poor English... |
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2011-06-11 01:00:27 +0200 | marked best answer | Sage notebook with secure connection If you are just trying to run the notebook on your own computer, you should just be able to do (which could be the whole thing above which you do, except the part after Do remember, though, that arbitrary Python code can be executed from the notebook, so nasty things can be done via an insecure notebook accessed from off line. If you're trying to set up a server, see (for instance) this wiki page in addition to the notebook documentation. |
2011-06-03 16:25:06 +0200 | marked best answer | Replace part of expression Alternatively, you can write your expression out using Sympy, a symbolics package that's included with Sage. (Sympy Documentation) Note that Sympy correctly identifies that You can now treat Note that we didn't have to convert EDIT: You can convert a Sympy expression back to a Sage symbolic expression by doing the following: |
2011-06-03 13:01:44 +0200 | marked best answer | Make sage to don't open brackets while solving equation I'm confused. If I do exactly what you've done above: I seem to get the answers you want. |