MFCS
Finate and Infinate sets:
Short clip: https://www.youtube.com/watch?v=BydchiZ8t6o
Long clip: https://www.youtube.com/watch?v=Mm-ZZzafP2Q

Inclusions sets:
Short clip: https://www.youtube.com/watch?v=yoAwRv1sYxc
Long clip: https://www.youtube.com/watch?v=yoAwRv1sYxc

Equality of sets:
Short clip:https://www.youtube.com/watch?v=OYGYqRj9-ok
Long clip: https://www.youtube.com/watch?v=yYCgTmFSD18


Proper Subsets:
Short clip:  https://www.youtube.com/watch?v=xotLg-oLboY
Long  clip: https://www.youtube.com/watch?v=Y2u6oIYrRmc

Universla Subnets:
https://www.youtube.com/watch?v=8innwDI1bv8
universal ser, complements,subsets: https://www.youtube.com/watch?v=ZlyLuTqo5qo

Null set:  https://www.youtube.com/watch?v=BhFgcf0VSYc

Singleton set: https://www.youtube.com/watch?v=OAAwCIndLxA

Power set : https://www.youtube.com/watch?v=1obxIn-WD3A

Disjoint set: https://www.youtube.com/watch?v=4mSKQL8uN_I


Abelian Group: https://www.youtube.com/watch?v=TGC6zXVdVx8

Cyclics Group: https://www.youtube.com/watch?v=8A84sA1YuPw

Group and subgroup: https://www.youtube.com/watch?v=ptRmr8LFfc4

group homomorphism:https://www.youtube.com/watch?v=cYzp5IWqCsg

kernal of homomorphism: https://www.youtube.com/watch?v=TngePpJ_x-I

Cosets of group: https://www.youtube.com/watch?v=TCcSZEL_3CQ

Binomial Theorem: https://www.youtube.com/watch?v=iPwrDWQ7hPc

inclusion and exclusion principle: https://www.youtube.com/watch?v=FOfEgJodjXc

enumerating permutations with constraints repetitions: https://www.youtube.com/watch?v=OtZIFmMy_Ew

compliment of graph: https://www.youtube.com/watch?v=pZR-R5bFLR0

Definication of tree:  https://www.youtube.com/watch?v=QFQlxtz7f6g


weakly connected graph: https://www.youtube.com/watch?v=A7iByRFzEy4


Strong connected graph:https://www.youtube.com/watch?v=3fCX4z8oCaI


Spanning tree: https://www.youtube.com/watch?v=fAuF0EuZVCk

Euler and Hamiltonian: https://www.youtube.com/watch?v=AwsMTEl79wI