Non-Euclidean Geometry [Topics in the History of Mathematics] 

I used to creep down stairs in the early hours of the morning in the 1980's to watch Open University. Happy days!

I used to watch them every weekend as a kid, because I got up early and there was no kid's TV on until later back then. If you wanted to watch TV early, only this was ever on lol.

We need more intellectually stimulating television programmes like this, and less X Factor.

this is fantastic! i love this timeless instructional programs

I actually remember watching this - it would have been one of its last TV showings in the mid 2000s (maybe this showing?) when I was a sleep-deprived teenager. Didn't quite get all of it but interesting to watch!

Beautifully told. Thus just triggers my curiosity.

Anyone else procrastinating math homework to watch this?

mind blown at 12:21

21:31 Oh, Jeremy!

I miss open university programs on tv on in the early morning

i love when he's making a particularly noteworthy point and his voice cracks.

Brilliant videography! The shirt that changed.. The camera dollies and the 3D models. Wow.

Jeremy Gray is still at the OU :)

Fantastic video. Helped me get the basics

Left school with no exams ,didn't like the style of teaching , used to watch these to see what I was missing got married and worked all hours god sent bang went watching them . Much later on I was recovering from severe ear infection and surgery read a book forget title in which it claimed that time is relative and gravity is a fictitious force. This was contrary to what I learned in school,I liked science there, got into special relativity and tried to understand general relativity still trying geometry on a sphere is the key but alas the mathematics is still beyond me. Learnt a lot about Einstein the man though .

0:15 either Jethro Tull or Mick Fleetwood teaching math.

Thank you for the upload! :)

Ah yes, curved space. *straightens monocle*

The 5th postulate *is* intuitively obvious.

Well, that was clear enough. Lolol.

Thanks for uploading ... Do you have anymore videos in the series?

It seems that men wore non-Euclidean clothes in the 1970's....

That gives me the fuckin' nostalgia horn

Oh man, I remember watching this when it was on! Up way too late.

i think euclid refered only to a straignt line in his parallel postulate. . a line drawn on a globe is not straight so the postulate do not apply.

Creepy good..

"The Sum of the Angles" by Concretism brought me here.

That parallel postulate looks obvious to me.

How I can get the script of this lecture or video?

Be honest how many of us had heard of this topic before now?

looks like a non eucledian beard :D

Good old bbc

we live in a non euclidean space

i'm procrastinating going to bed ;)

I watched this as part of my degree course!

This is dumb. Euclid's postulates are valid IN Euclidean space. Gee, why doesn't diesel work in a gasoline engine?

blew my mind

Geometry hmm interesting.

This guy must have got some serious poontang