Overflow Error Complex Exponentiation
AAA+BBB+CCC+DDD=ABCD Movie about a board-game that asks the players touchy questions Balanced triplet brackets Extreme Value Theorem on Manifold Why are planets not crushed by gravity? there cannot be integer overflow in Python. Not the answer you're looking for? Committed revision 54237. http://sisei.net/overflow-error/overflow-error-in-frx.html
Why is AT&T's stock price declining, during the days that they announced the acquisition of Time Warner inc.? We know that floats overflow. Carrying Metal gifts to USA (elephant, eagle & peacock) for my friends Was the Boeing 747 designed to be supersonic? Powered by vBulletin Version 4.2.2 Copyright © 2016 vBulletin Solutions, Inc. website here
It's "import math" not "import floatmath" (which is more like what it really is). BachstelzeSeptember 25th, 2010, 09:07 PMI thought it would calculate pow as floating point number anyway... But there are a *lot* of special cases to think about.
As I said, in some applications you really want full-precision exponentiation of integers (e.g. more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed up vote 5 down vote favorite According to the python documentation exception OverflowError Raised when the result of an arithmetic operation is too large to be represented. For floats, we can think about the two-point compactification of the real line (okay, with a doubled zero, which messes things up a little bit), which is a fairly sane space
Why can't I set a property to undefined? Administration User List Committer List Help Tracker Documentation Tracker Development Report Tracker Problem Issue15996 classification Title: pow() for complex numbers is rough around the edges Type: enhancement Stage: test needed Components: kroq-gar78September 25th, 2010, 10:09 PMThanks Bachstelze. you could try here This issue is now closed.
Not the answer you're looking for? Barring a clear standard for pow() in C99, the documentation for pow 3 in glibc http://www.kernel.org/doc/man-pages/online/pages/man3/pow.3.html seems solid for a start, however it only describes behaviour for float/double values. I must admit I never use pow, though, I use ** for integer exponentiation, and math.pow for floats. msg170891 - (view) Author: Mark Dickinson (mark.dickinson) * Date: 2012-09-21 14:08 > C99 contains cpow.
I've posted the full analysis in an answer. –user2357112 Aug 14 '13 at 23:11 1 @user2357112 actually, your explanation is consistent with almost all of my answer -- you just Messages (2) msg31474 - (view) Author: John Dong (jdong2002) Date: 2007-03-09 05:21 >>> (1-24j)**34324324 Traceback (most recent call last): File "
Maybe this doesn't have to do with complex exponentiation at all. >>> (1e309)**2 inf >>> (1e308)**2 Traceback (most recent call last): File "
org> Date: 2013-10-13 16:33:21 Message-ID: 1381682001.85.0.195785980602.issue15996 () psf ! Also, there's a special case for small integer exponents that uses exponentiation by squaring, which involves complex multiplication. Ok, you may say it's a minor issue because there's pow(), but it confused the OP, who is a beginner... navigate here It looks like the implementation of complex numbers (a + bi) are less inclined to give inf, and more to give (nan + nanj).
I propose adding a test-case file similar to cmath_testcases.txt (attached) and a test runner similar to test_cmath.py msg170866 - (view) Author: Mark Dickinson (mark.dickinson) * Date: 2012-09-21 07:57 Well, C99 covers za [Download message RAW] Mark Dickinson added the comment: See also http://stackoverflow.com/q/18243270/270986 , which points out the following inconsistencies: >>> 1e300 ** 2 OverflowError: (34, 'Result too large') >>> 1e300j ** Stack Overflow Questions; Tags; Users; Read more Complex Number Objects Python 2.7.10 documentation If divisor is null, (Py_complex num, Py_complex exp)Â Return the exponentiation of num by exp, Complex Numbers as
Join them; it only takes a minute: Sign up In what cases does Python complex exponentiation throw an OverflowError?
What is the possible impact of dirtyc0w a.k.a. "dirty cow" bug? WybiralSeptember 26th, 2010, 09:59 PMYeah, but it should then be pythonically generic, output according to input, as in pow, and not inconsistent in math.pow with that idea with a requirement to math.pow() works like C's pow() instead of Python's pow(). TaftSpringer Science & Business Media, 2000 - 560 σελίδες 0 Κριτικέςhttps://books.google.gr/books/about/Consolidated_Ada_Reference_Manual.html?hl=el&id=YJ_0O9Z-knoCISO (the International Organization for Standardization) and IEC (the International Electrotechnical 1 Commission) form the specialized system for worldwide standardization.
share|cite|improve this answer answered Jul 11 '12 at 21:28 PAD 2,885712 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign While the rest works generically, lots of times hiding the details of the C Standard Library, math.pow doesn't and brings in requirements that are out of place in a duck-typed language. That math.pow is specifically a float is interesting; could be one of these rare cases where I might actually agree with worksofcraft's objections to Python's handling of number types. his comment is here History Date User Action Args 2013-10-1318:26:20rhettingersetnosy: + rhettingermessages: + msg199752 2013-10-1316:33:21mark.dickinsonsetmessages: + msg199729 2012-09-2320:52:39jceasettype: behavior -> enhancementstage: test needed 2012-09-2320:51:50jceasetnosy: + jceatype: enhancement -> behaviorstage: test needed -> (no value) 2012-09-2315:59:10mark.dickinsonsettype:
Exponentiation by integer error is that changing the Read more