Many financial practitioners are from mathematics and physics, so it is very important.
Finance: Finance refers to the issuance, circulation and withdrawal of money, the issuance and recovery of loans, the deposit and withdrawal, exchange and other economic activities.
Finance (FIN) is to realize the equivalent circulation of value and profit after re-integration of existing resources. (The professional saying is that the process from saving to saving can be narrowly understood as financial dynamic monetary economics. In the era of gold standard, gold is recognized as the best value representative by the world. Gold refers to gold, melting. At first, it refers to melting solid into liquid, and also refers to financing. So finance is to melt gold and trade it separately, that is, the circulation of value. Now gold has been largely replaced by paper money, electronic money and so on, but the circulation of gold as a value has not changed. Without the circulation of value, finance will become a "pool of stagnant water". Without the conversion of value, the economy will not operate. Like many other disciplines, the essence of finance is to study and explore the objective laws of finance. However, due to the short time for human beings to enter the financial society, human beings are still in the era of financial flooding, and there is still a long way to go to discover the laws of finance. Because of this, financial crises occur frequently!