Mathematica

Ramsey Number R(3,k)=1,3,4 mod 5
Ramsey Number R(3,k)\[Congruent]1,3,4 mod 5 o o o o o ....o o o o o ... o o o Conjecture: The vertexes of Ramsey critical graph G(3,k) can be arranged as interlacing with 2 vertexes and 3 vertexes. So, R(3,k)-1=0,2,3 mod 5, R(3,k)=1,3,4 mod 5 R(3,10) is between [40,43]. If my conjectu... 2 Feb 2010 15:16

Dynamic plot + real data set
I have a data set {x,y}. I want to plot it on the same graph along with a function that I can change with the Dynamic tool. I can't seem to use the Show[] command as, Show[Dynamic[ Plot[vis1[x]/0.8, {x, 0, 120}, PlotRange -> {0, 1}, AxesLabel -> {power, Relative Visibility1}]], ListPlot[{{20.5, 0.8035}, {40, ... 2 Feb 2010 15:16

A question about a sphere
Dear Sir, I am a Mathematica 7 user. I have a question : I want to draw a sphere, then draw 5 circles on this sphere like *latitudes*and draw 5 lines on this sphere like *longitudes*. I need your help. Thanks in advance Marwa Ali ... 4 Feb 2010 06:39

Evaluating Problem in Generating Random Text
I try to generate random text and compare this with real text, but my computer can't evaluate my code, can you inform me whether your computer evaluates it or not? And do you have any suggestions which can help me with generating this code in my computer? Best... Osman Tuna ListLogLogPlot[{Reverse[ Sort[La... 2 Feb 2010 15:15

File Stamp on Plots?
I'm having some trouble getting a file stamp and a date stamp on plots. Any help? ... 2 Feb 2010 15:16

how to make lines wider in legend
Dear MathGroup, Basically, I have legends that look like - - - plot 1 ___ plot 2 but I want them to be - - - - - - plot 1 ______ plot 2 I see that this question was posed in 2001 and answered, but I don't really understand the solution. Can it be explained for this bozo? I'm good with structural pr... 2 Feb 2010 15:16

any support for processing MP3-encoded sound files?
Hello mathGroup: I was able to Import[]/Export[] the ".WAV" format, but I cannot find any support for ".MP3" decode/encode. Also I only found one unanswered query about this in this group. Does anyone have any info about this? TIA. Roger Williams Franklin Laboratory ... 4 Feb 2010 06:39

How to combine graphics pimitives and Plot function?
points = RandomReal[{-1, 1}, {100, 2}] Graphics[{Red, Line[points], Plot[Sin[x], {x, -10 Pi, 10 Pi}]}, Axes -> True] The code doesn't work. how to draw them together? ImageCompose ? ... 2 Feb 2010 15:16

Prime Rotating Diagram
PrimeRotatingDiagram.nb <http://att.newsmth.net/att.php?p.749.82091.545.nb> - http://att.newsmth.net/att.php?p.749.82091.545.nb Suppose p[i] is the i-th prime. Start from coordinate origin (0,0) , firstly draw a line segment at the direction of positive X-axes and the length is 2=p[1], secondly rotate an... 2 Feb 2010 15:15

Coloring a Sum
Re 7.0.1 under WinXP. Is there simpler code (than that below) for this task: - For numeric list X = {x1,...,xN}, color and display the form x1 + ... + xN - To color, first split X into m-element sublists - Color red (blue) the elements in odd (even) numbered sublists Thanks. Bruce f[X_List, m_In... 2 Feb 2010 15:15