Archives for September 17, 2011

Galileo on infinity

Stung by some rather odd language on wikipedia at [[Two New Sciences#Infinite sets]], I’m reading the bits about infinity in “Two New Sciences” (Discourses and Mathematical Demonstrations Relating to Two New Sciences aka Discorsi e dimostrazioni matematiche, intorno à due nuove scienze, 1638) via the translation available at http://galileoandeinstein.physics.virginia.edu/tns_draft/tns_001to061.html. If you look at the oldid…

Climbing tales of terror

Its a book, in fact. I remember browsing it in the good old days when I used to climb. But today I was browsing Rock Athlete which is Ron Fawcett’s book, and contains the following memorable story, which I will share with you because I liked it so much: In the old days, a pair…