PAC学习框架提供了一种形式化的方法来量化概念类的可学习性。
When I look at the world I'm pessimistic, but when I look at people I am optimistic.
Never underestimate the power of a diverse team.
I always try to learn from every match, win or lose.
The war on coal is a war on the American worker.
Without sacrifice, there is no freedom.