π§Ίβπ§Ί=π«β π
β¬οΈβπ
ππε€§
ππ₯π―
π¦β¬οΈβ¬οΈβ¬οΈ
ππ
β¬οΈπ/π―π
πβπ
#erdΕsβkoβrado #intersecting families #combinatorics #extremal set theory #non-empty intersection #maximum size