AlgTop0: Introduction to Algebraic Topology
Why Mathematics Stack Exchange recommends it
Mathematics Stack Exchange users point people to it as an intuition-focused introduction to algebraic topology and homotopy, and as part of lists of free university-level lecture courses.
Recommended by 3 people across 3 different months, 2013 to 2016.
What it is
The opening lecture of N J Wildberger's beginner's course on algebraic topology, recorded at UNSW in 2010. It previews the course topics and introduces three motivating problems.
What people said
Strong rec JKnecht · 2016-02 · Mathematics Stack Exchange · on “Explain "homotopy" to me”
I have just started to watch these video lectures on algebraic topology and the lecturer is excellent and really focused on building up a good understanding of the intuition behind algebraic topology. Algebraic Topology: a beginner's course - N J Wildberger [this video]
Recommends Elias Costa · 2013-05 · Mathematics Stack Exchange · on “List videos of interesting courses at the doctoral level.”
Many mathematics departments has provided video lessons their courses (usually one semester) that are offered in their doctoral programs in mathematics. Most often these courses total average of 26 videos each containing a single class. Below is a list of introdutory courses on video. Introduction to Algebraic Topology [this video] Introduction to Lie Algebras [LINK] Extremal and Probabilistic Combinatorics [LINK] I would appreciate if people could add on to this list. Observation To a greater audience reach classes should preferably be in English language and introdutory curses. Observation I will not be specific as to the area of investigation. Since I believe that the answers here will be usef
Recommends JMoravitz · 2016-12 · Mathematics Stack Exchange · on “Mathematics Online Lectures”
Although I disagree with Nj Wildberger's realist and finitistic views, his undergraduate course on algebraic topology [this video] was a good watch. Just ignore all of his insisting that we can only use rational numbers and allow for all real numbers as well.