jedishrfu's latest activity

We didn't. feel anything in Texas. I couldn't catch your joke; the writing is too small to zoom in on. When was the last time Ontario...

Will wonders never cease? Someone built a LEGO version (if only the Greeks had invented LEGO first):

and these videos showing the gears in motion:

I couldn't resist: A snapshot of Kirk and Spock on a planet wearing togas, with Spock checking the device for the next lunar/solar...

There were some interesting gears in the device. In particular, one gear slipped back and forth to handle the lunar anomaly. Gears were...

The text is correct. They assume the theorem is false and show this leads to a contradiction of the condition that b is irrational.

Yeah, these are timeless test tropes but for me, the video short: is a classic and says it all!

Astrophysics is on a quest to discover if Earth is a cosmic rarity or just one of many "Goldilocks" worlds. Much of this hope rests on...

I was tacitly assuming that "not allowed in equations" did not include limit expressions, limits of summations, or definite integral...

I think that is overstating, see, e.g. $$\frac \pi 4 = \sum_{k=0}^\infty \frac {(-1)^k} {2k+1}$$ Oops, it seems @jedishrfu beat me to...

There are several uses of term "infinite", "infinity", or the symbol ##\infty## in mathematics. The natural numbers, for example, is an...

There is one place where infinity is allowed in math as the symbolic end of a limit expression to mean there is no end and it's found in...

It seems that parts of the paper are Italian-to-French translation of the first edition of the book, so they are almost identical to the...

My favorite out-of-the-box experience is the Scarecrow in The Wizard of Oz (1939). On several occasions, he comes up with novel...

The recommendation I got was to use his book, as mentioned in an earlier post by @romsofia, as a basis, and to look for modern...