Uploaded June 2017 | Updated September 2026, 1 week ago
demonstrations.wolfram.com/NormalAndLogNormalProbabilityDensityFunctionsWithIdenticalMe
The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily.
This Demonstration compares a log-normal distribution probability density function (PDF) with parameters ? and ? with a normal distribution PDF with parameters ? and ?. Both PDFs have identical mean and standard deviation. Since the log-normal distribut...
Contributed by: Diego M. Oviedo Salcedo
Audio created with WolframTones:
tones.wolfram.com
demonstrations.wolfram.com/NormalAndLogNormalProbabilityDensityFunctionsWithIdenticalMe
The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily.
This Demonstration compares a log-normal distribution probability density function (PDF) with parameters ? and ? with a normal distribution PDF with parameters ? and ?. Both PDFs have identical mean and standard deviation. Since the log-normal distribut...
Contributed by: Diego M. Oviedo Salcedo
Audio created with WolframTones:
tones.wolfram.com


. The contributions from ?=...
Contributed by: Brad Klee
Audio created with WolframTones:
http://tones.wolfram.com Multipole Expansions of Electric Fields](https://i.ytimg.com/vi/DiuERmCNxuA/mqdefault.jpg)


![Roulette (Hypotrochogon) of a Polygon Rolling inside Another Polygon
http://demonstrations.wolfram.com/RouletteHypotrochogonOfAPolygonRollingInsideAnotherPolygon
The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily.
A hypotrochogon is the trace (roulette) of a point attached to a regular polygon rolling without slipping inside another regular polygon [1]. The hypotrochogon can be curtate if the tracing point is inside the rolling polygon, or prolate if it is outsid...
Contributed by: Erik Mahieu
Audio created with WolframTones:
http://tones.wolfram.com Roulette (Hypotrochogon) of a Polygon Rolling inside Another Polygon](https://i.ytimg.com/vi/EKbcdYe4S9Y/mqdefault.jpg)



![Powered Clique Polyhedra
http://demonstrations.wolfram.com/PoweredCliquePolyhedra
The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily.
Can a tetrahedron be divided into similar tetrahedra of different sizes? The answer is not known, but a solution for triangles was found by Zak [1]. This triangle, shown further in [2], has edges that are all powers of ?=1.1509639252577..., a ro...
Contributed by: Ed Pegg Jr
Audio created with WolframTones:
http://tones.wolfram.com Powered Clique Polyhedra](https://i.ytimg.com/vi/FSdRtVPul30/mqdefault.jpg)
