Lecture 2 - Quotient topology and CW Complexes

00:00 Introduction
2:40 Quotient Topology
21:15 CW Complexes
36:29 CW Structures on RPn and CPn
47:22 Product Toplogy
52:28 Homotopy of Maps

[@Grassmpl]

I'm reading this in Hatcher's Textbook. The video explanation is much more clear than the book.

[@mohammadtahmasbi316]

Your teaching is great. I really enjoyed. Thank you.

[@alijoueizadeh2896]

Thank you.

[@mmwapec]

it'd be great if you could share the notes aswell, thanks

[@hyperduality2838]

Null homotopic is dual to non null homotopic -- Janus holes/points or duality!
Antipodal points identify for the rotation group -- duality.
Points are dual to lines -- the principle of duality in geometry.
Duality creates reality!

[@totanghosh7158]

I am a bit confused about how you define h(\theta) (time 57:44)

[@asht750]

What is the D^n?

[@toufikoran8416]

Dn={x in Rn /|x|

[@walterrudin35]

n closed disc.