Mathematics - Recreational Math

Thread preview

Thread	Last Post	Replies

Mate & Vladimir discover YET another severe Maple bug the long liver (int, 2000--2007--?) at Cyber Tester's CAS exact challenge ascent	30 Jun 2007 18:34 GMT	1
Hello all our readers who care about the efficiency, Thanks to the recent Mate's message of June 27 http://groups.google.com/group/sci.math.symbolic/msg/0b01be8297437a25 yet another bug the long-liver is caught. (A nice catch, as some
gps	30 Jun 2007 17:50 GMT	10
if you know the time/date and the frequency of the broadcast signal from a gps satellite, could you determine your position by using the doppler shift of the recieved signal? you also have a fix on north.
2 cylinders	30 Jun 2007 15:58 GMT	2
Can anyone help me please? I want to make 2 concentric cylinders. The outer cylinder is one-way mirror film, with the mirror on the inside.
Yet another Maple 11 regression bug: 1-D sum (power, a TRIVIAL sum, Error, (in unknown) invalid input: membertype expects its 2nd argument, s, to be of type {set, list, module, function}, but received -1/2IPi^2)	30 Jun 2007 13:57 GMT	2
................................................................. Hello again from the VM machine... ................................................................. BUG # XXXXX sum (1-D): Error, (in X) invalid input ...
Software bugs: Carette's law	30 Jun 2007 03:39 GMT	2
.............................................................. "Users incorrectly assume that most of the bugs that they have encountered are known". [Carette's wording is impressively exact. Same holds for at
5 points - mean centre.center	30 Jun 2007 03:02 GMT	2
Right place and hope someone will feel kindly towards me. If I have 5 points how can I determine the mean centre? tia
1-exp(1)+exp(exp(1))-exp(exp(exp(1))) + - ... =?	29 Jun 2007 14:41 GMT	9
Subject says all... How would one handle that divergent sum? Btw, I think I have correctly got about 0.246960868[386...
Maple 11: The inertia of history	28 Jun 2007 21:34 GMT	1
................................................................. Dr Jacques Carette http://www.cas.mcmaster.ca/~carette/ writes ................................................................. http://www.mapleprimes.com/forum/is-this-a-bug
Software Engineering Institute: Pursue Better Software, Not Absolution for Defective Products	28 Jun 2007 21:22 GMT	18
http://www.sei.cmu.edu/news-at-sei/features/2001/1q01/feature-1-1q01.htm [ ... ] We believe that the practice of software engineering is sufficiently mature to enable the routine production of near-zero-defect software.
Bug in Mathematica 6 - Integrate - 20 - (Sqrt, false divergence)	28 Jun 2007 09:20 GMT	2
Hello again from the VM machine... Integrate[1/(3 (1-z^2) - (4+3 z) Sqrt[1+z]), {z, 0, 1}] NIntegrate[1/(3 (1-z^2) - (4+3 z) Sqrt[1+z]), {z, 0, 1}] Integral does not converge
Yet another Maple 11 regression bug: int (power) - total bunk, again.... we reported such stuff a couple of years ago... look at www.cybertester.com 1st page	28 Jun 2007 02:04 GMT	4
................................................................. Hello again from the VM machine... ................................................................. Man+Machine Review Of Maple Crisis
Find the nearest point by latitude longitude	27 Jun 2007 23:14 GMT	41
Here is my problem: A list of points, of an indefinite length, having latitude and longitude values. I need to find the closest point to A, that is not A.
An exact 1-D integration challenge - 45 - we mean, a challenge for Maple	27 Jun 2007 10:50 GMT	8
Hello computer algebra fans, Is there a soul who can invent and show the steps how to get to the exact value of this integral int(arctanh(z)ln(1-exp(2I*arctan(z))), z= 0..1);
[Polnaya khremoten'] New regression howler in Maple 11 (trivial integral)	26 Jun 2007 21:28 GMT	4
Hi , enjoy! Maple 11> int(exp(z)exp(-z), z= 0..1); Error, (in IntegrationTools:-Definite:-Main) cannot split rhs for
Bug in Mathematica 6 - Product - 1	26 Jun 2007 20:14 GMT	5
Hello again from the VM machine... The result for an infinite product depends on the multiplication variable which is absurd. Product[1 + (-1)^n/(n (n + 1)), {n, 2, Infinity}]