Squeeze theme (Sandwich Theorem), also known as bilateral pinch theorem, pinch criterion, pinch theorem, pinch theorem and sandwich theorem, is one of the two criteria for judging the existence of limit.
Closed domain nesting theorem: The English name of the theorem is theorem of nested interval, so translating it into interval nesting theorem and closed interval nesting theorem is one of the six equivalent propositions about the continuity of real numbers.
Lagrange mean value theorem: it is also a high number theorem, generally called Lagrange theorem. 1797, French mathematician Lagrange put forward this theorem in analytic function theory.
Hairless Theorem of Black Holes: Proved by Stephen Hawking and Brandon Carter in 1973. In other words, a black hole has only three conserved quantities of electromagnetic radiation, namely mass, angular momentum and charge, and all other information ("hair") is lost, so it is called the hairless theorem of black holes.
A bird in the hand: in economics, there is a bird in the hand, also known as the bird in the hand, which comes from the proverb "Two birds in the forest are worth a bird in the hand". Of course, investors prefer to pay dividends in cash rather than leave the profits to the company. Therefore, the more dividends a company pays, the greater its market value.