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seen May 30 at 21:04

Feb
14
answered Equidecomposability of a Cube into 6 Trirectangular Tetrahedra
Jan
16
awarded  Commentator
Jan
16
comment Why do some people use $+\infty$ instead of $\infty$?
I wrote some notes on $\infty$ that might be of interest at rhubbarb.wordpress.com/2009/04/08/notions-of-infinity
Nov
27
awarded  Editor
Nov
27
asked Number rings and (round) parentheses versus (square) brackets
Nov
7
comment Software for drawing geometry diagrams
This is very expensive. A free, partial-alternative is wxMaxima. andrejv.github.io/wxmaxima/screenshots.html
Aug
29
awarded  Tumbleweed
Aug
28
comment Distinguishing equality and isomorphism as relations
You might also consider that a set (with some structure) might be isomorphic to itself via some mapping other than the identity (corresponding to the equality relation). Sets-with-structure may be (self-)isomorphic in more than one way.
Aug
28
comment Relation: pairwise and mutually
Here's a link to a relevant Wikipedia section: en.wikipedia.org/wiki/Mutual_independence#More_than_two_events
Aug
22
asked Are there references on the correspondence between properties of relations versus operators?
Jan
18
awarded  Teacher
Dec
31
answered Fun but serious mathematics books to gift advanced undergraduates.
Dec
31
comment Fun but serious mathematics books to gift advanced undergraduates.
+1 for Wilf, but almost -1 for Conway (although other works by Conway are definitely worth investigating).
Dec
31
comment Fun but serious mathematics books to gift advanced undergraduates.
+1 for Concrete Mathematics. This is an extraordinary and wonderful book.
Sep
20
answered Mathematical equivalent of Feynman's Lectures on Physics?
Sep
7
comment Mathematical equivalent of Feynman's Lectures on Physics?
As an aside, if you like Feynman's "Lectures on Physics", I'd also highly recommend QED (again on Physics) which is a small but remarkable book. On a different subject is his "Lectures on Computation", which is another very unconventional treatment, also highly recommended.
Sep
7
comment Mathematical equivalent of Feynman's Lectures on Physics?
I think that the most significant features of Feynman's treatment of the subject are his unconventional approach (RPF's analyses are often unique, where other texts are similar to each other) and clarity of explanation from first principles. I am very fond of mathematics, and am likewise looking for a mathematical work with a similar level of non-conventionality in topic choice in addition to treatment.
Sep
7
awarded  Supporter