离散数学

离 = 亠 + 凶 + 禸 : Mnemonic symbol: from 离心机 or 离心分离机, a centrifuge.

离 = 亠 + 凶 + 禸 : Li Qingzhao is about to leave the space station. As a souvenir she put her beret in the space station's centrifuge and got a demon mask out. Angrily she tramples on the demon mask because what she wanted was a nice and modern hat.

散 = 井 + 月 + 攵 : Mnemonic symbol: a watering can, because it disperses its water everywhere.

In the anthill's bathroom (an4), Socrates (s) broke down (散) the moon (月) using a sledgehammer (攵). He is now fetching water for his watering can (散) from the well (井), because he plans to disperse (散) the remaining dust and small pieces of the moon by dispersing (散) water everywhere.

散 = 井 + 月 + 攵 : Mnemonic symbol: a watering can, because it disperses its water everywhere.

In the anthill's bathroom (an4), Socrates (s) broke down (散) the moon (月) using a sledgehammer (攵). He is now fetching water for his watering can (散) from the well (井), because he plans to disperse (散) the remaining dust and small pieces of the moon by dispersing (散) water everywhere.

数 = 娄 + 攵 : Sheldon Shrimp (shu) occupied a lunar mansion (娄) inside of the space station (Ø3) although he knows that it is to be torn down. Outside of his lunar mansion the construction (or rather destruction) workers are already counting (数) down from ten. When they count (数) zero, they will start taking down the whole thing with their sledgehammers (攵).

学 = 小 + 冖 + 子 : Xu Xian wants to study scienceology and learn more about daisies. Just inside the elevator's kitchen, he put some daisies into a prize cup and covered them with a cooking top. He wants to study the growth rate of the daisies depending on the pH of the water in the prize cup.