================================== Top new questions this week: ==================================
[\(\sum _{k=1}^{\infty } \left \lfloor \frac {5}{5^k}\right \rfloor \) giving wrong answer?] http://mathematica.stackexchange.com/questions/102722/sum-k-1-infty-left-lfloor-frac55k-right-rfloor-giving-wrong-ans
When I try to evaluate the following:
\[\sum _{k=1}^{\infty } \Bigg \lfloor \frac {5}{5^k}\Bigg \rfloor \]
using
Sum[Floor[5/5^k], {k, 1, \[Infinity]}]
Mathematica provides an answer of \(0\) when it ...
- asked by 1110101001 (14 votes), answered by ttetrafon (-4 votes)
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[How do I insert a calculated value into a text cell?] http://mathematica.stackexchange.com/questions/102849/how-do-i-insert-a-calculated-value-into-a-text-cell
Suppose in a notebook I’ve calculated the value of some expression and assigned it to a variable. How do I insert the value of that variable in a text cell without just typing in the value? That is, I ...
- asked by Robert B (10 votes), answered by eldo (3 votes)
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[Prevent Plus from threading] http://mathematica.stackexchange.com/questions/102721/prevent-plus-from-threading
This is probably a very simple question, but I couldn’t find a duplicate.
As everybody knows, x, y + v gives x + v, y + v. But if I intend v to represent a vector, for example if I am going to ...
- asked by Rahul (10 votes), answered by JHM (5 votes)
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[What kind of patterns in a list of rules would benefit from being Dispatched?] http://mathematica.stackexchange.com/questions/102873/what-kind-of-patterns-in-a-list-of-rules-would-benefit-from-being-dispatched
I have a long list of rules for manipulating expressions. They are of the form:
complexRules = {f[x_, y_]^2 :> (*something*), f[x_, y_] f[x_, z_] :> (*something*), ...
- asked by QuantumDot (9 votes), answered by Schopenhauer (7 votes)
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[Revolution of Koch Snowflake] http://mathematica.stackexchange.com/questions/102697/revolution-of-koch-snowflake
How to plot shape which made from revolution of the Koch Snowflake?
I try to use \(RevolutionPlot3D[f,\lbrace {t,t_1} \rbrace ]\), but I think there is no \(f\) for Koch Snowflake.
Sorry for my ...
- asked by vito (9 votes), answered by ubpdqn (11 votes)
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[Reverse Polish Notation] http://mathematica.stackexchange.com/questions/102976/reverse-polish-notation
Is there a way to evaluate a string containing RPN in Mathematica?
SE thinks this question is too short, so let me expand on it. Do you know of any function, that provides the following ...
- asked by murphy (8 votes), answered by Mark Adler (4 votes)
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[Bug? Completely wrong results from NSolve] http://mathematica.stackexchange.com/questions/102724/bug-completely-wrong-results-from-nsolve
The following code creates two polynomials \(q_1\) and \(q_2\) in variables \(c\) and \(p\), then uses NSolve to find roots. But the polynomials don’t evaluate to zero at those roots.
pp[n_] := If[n > 0, ...
- asked by Jerry Guern (8 votes), answered by Rom38 (6 votes)
================================== Greatest hits from previous weeks: ==================================
[Advice for Mathematica as Mathematician’s Aid] http://mathematica.stackexchange.com/questions/92686/advice-for-mathematica-as-mathematicians-aid
I use Mathematica mainly as an aid in symbolic attacks on problems, usually intermediate or harder and often number theoretic. While Reduce, Simplify, et al. are remarkably powerful, they of course ...
- asked by CarlEdman (55 votes), answered by MarcoB (39 votes)
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[Where can I find examples of good Mathematica programming practice?] http://mathematica.stackexchange.com/questions/18/where-can-i-find-examples-of-good-mathematica-programming-practice
I consider myself a pretty good Mathematica programmer, but I’m always looking out for ways to either improve my way of doing things in Mathematica, or to see if there’s something nifty that I haven’t ...
- asked by J. M. (386 votes), answered by faysou (354 votes)
================================== Can you answer these? ==================================
[CDF Enterprise : Protection and licensing] http://mathematica.stackexchange.com/questions/102650/cdf-enterprise-protection-and-licensing
I am new to Mathematica but on top of that I am asked to create a CDF file that is IP protected (encrypted) and also licensed.
In this video they are giving the way to protect the code. At the end ...
- asked by Erdem (3 votes)
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[Speedup ListCorrelation when using generalized correlation function] http://mathematica.stackexchange.com/questions/102708/speedup-listcorrelation-when-using-generalized-correlation-function
ImageCorrelation provides several general function that can be used to replace the default Dot function. For example, in the documentation of ImageCorrelation, there is an example using CosineDistance ...
- asked by xslittlegrass (1 vote)
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[How can I define geographic regions and new entities?] http://mathematica.stackexchange.com/questions/102948/how-can-i-define-geographic-regions-and-new-entities
There are three functions (GeoListPlot, GeoGraphics and Entity) related to working with geographic regions but it is not clear from the documentation how to create new Entities or custom geographic ...
- asked by Tyler Durden (4 votes)