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# Cleve Moler

### MathWorks

Last seen: 3 days ago Active since 2012

The world's first MATLAB programmer.

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Pizza!
Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...

4 months ago

Published

Computers That I Have Known
Nick Higham's Numerical Linear Algebra group at the University of Manchester is hosting a conference celebrating Jack...

7 months ago

Redirecting arithmetic functions from LAPACK/BLAS?
It might help to use the transposes of your arrays or interchange the order ot your loops. MATLAB stores 2-d arrays by coluumns...

7 months ago | 3

Published

Complexity of Computing the Eigenvalues of a Symmetric Matrix
I am giving a five-minute talk today, May 26, at the virtual seminar on Complexity of Matrix Computations. Here are my...

8 months ago

Published

Computing Eigenvalues of Symmetric Matrices
Computing Eigenvalues of Symmetric MatricesSee revision.Get the MATLAB code (requires JavaScript) ...

8 months ago

Published

Bringing Back the Bucky Ball
The Bucky Ball provides an elegant example of a graph, the connectivity of the Buckminster Fuller geodesic dome.We are also...

8 months ago

Published

Solving Commodious Linear Systems
This is about linear systems with fewer equations than variables; A*x = b where the m -by- n matrix A has fewer rows that...

9 months ago

Published

Easter Sunday and April Fools
What do the years 2018, 2029 and 2040 have in common? They are the only years in the 21st century when Easter Sunday occurs...

10 months ago

Published

“Odd Rock” on Mars Exhibits (Almost) Magic Square
A news story released yesterday, March 31,by c|net has the headline... read more &gt;&gt;

10 months ago

Published

Mount St. Helens and Matrix Rank
What do Mount St. Helens and the rank of a matrix have in common? The answer is the MATLAB function peaks. Let me explain....

10 months ago

Published

Round, With Tie Breakers, Round Three
I recently published Round, With Ties to Even and followed that with Round Two. Then, in an email, Andy Bartlett pointed...

11 months ago

Published

Round, With Tie Breakers, Round Two
I published Round, With Ties to Even a couple of days ago. Steve Eddins and Daniel Dolan immediately had substantive...

11 months ago

Published

Round, With Ties to Even
We are considering a MATLAB Enhancement Request to support options for round(x) when x is exactly halfway between two...

11 months ago

Published

CR and CAB, Rank Revealing Matrix Factorizations
The rank of a linear transformation is a fundamental concept in linear algebra and matrix factorizations are fundamental...

1 year ago

Published

Holiday Greetings 2020
I want to share some colorful images featuring the seven colors in the MATLAB axes color order.... read more &gt;&gt;

1 year ago

Published

A Famous Equation, x^2 = 2^x
A recent episode of the popular YouTube channel "blackpenredpen" is about solutions to the famous equation... read more...

1 year ago

Published

Paul Saylor, 1939-2020
My friend Paul Saylor passed away on November 7th.... read more &gt;&gt;

1 year ago

Published

Anticipating Official U.S. Census for 2020
On October 13, the U.S. Supreme Court ruled that the U.S. Census Bureau could stop the 2020 census early. Here is a link to...

1 year ago

Submitted

Cleve_Lab
A Mathematical Exploratium

Published

Notes on CR and west0479
My post a few days ago, Gil Strang and the CR Matrix Factorization, generated a lot of email. Here is the resulting...

1 year ago

Published

Gil Strang and the CR Matrix Factorization
My friend Gil Strang is known for his lectures from MIT course 18.06, Linear Algebra, which are available on MIT...

1 year ago

Published

Two Dubious Ways to Solve A*X = X*B, part 1
Recently, I had email from a student in Italy.... read more &gt;&gt;

1 year ago

Published

Addition to SVD and Partisanship in the U. S. Senate
I have added this section to my post a few weeks ago about using the SVD to measure partisanship in the United States...

1 year ago

Published

SVD Quantifies Increasing Partisanship in the U. S. Senate
Many observers have noted that the United States Senate has become increasingly partisan in recent years. Votes are being...

1 year ago

Published

Collatz Inequality and Singleton Expansion
I've blogged about this gem from Lothar Collatz (1910-1990) before, but it deserves to be repeated. Especially since it now...

1 year ago

Published

Serendipity, Kuramoto, Colleagues and Backslash
Alexa tells me that the definition of serendipity is "the occurrence and development of events by chance in a happy or...

1 year ago

Published

A Mesmerizing Animation
A Mesmerizing AnimationWe are working on a paper about the Kuramoto model of self-synchronizing oscillators. This animation...

1 year ago

Published

"A History of MATLAB", a 67-page paper that Jack Little and I have written, has been published by the ACM, the Association...

1 year ago

Published

Moler on E-NLA, Wednesday, May 27
It has been a while since I made a blog post. It is because I am preparing to give a talk next week on"The Evolution of...

1 year ago

Published

Precise Setting of a Delicate Parameter with “pibar”
(A slight revision of the post I made a few hours ago.)... read more &gt;&gt;

1 year ago