
Apolloniana: pages on Apollonian disk packings.


Lie mandala: a diagram that shows the structure of a Lie algebra.


Graphs we live by
(graphs known not only in math)


1+1=2
(GetStankiewicz's Marble Plaque in Honor of Elementary Operations)


3+4=7
(also, a translation into portuguese
by A. Solecki)


History of the concept of time
(a poster)


Physics of time machines
(bibliography, classification)


Universal constants: a remark on h, c & G.


Triangle
(varia on trig and triangle)


Gradcurldiv in one diagram!
(deeper meaning of Calc III)  New: with MathJax!


Soon to be added:
Tense system as a model of time
(a theory of the grammatical tense)



A few items in Polish
