Enrico Betti (1823.10.21-1892.08.11)) Italian mathematician18231October. He studied mathematics at the University of Pisa, participated in the Italian War of Independence, and later taught mathematics at pistoia Middle School. From 65438 to 0865, he was awarded a professorship at the University of Pisa until his death. /Senator Kloc-0/862, Senator Kloc-0/884, Deputy Minister of Education 1874. Betty's early work involved Galois theory, which has just been published. He clearly stated and proved the conditions for the radical solution of algebraic equations that were unknown at that time. From 65438 to the 1960s, he studied the theory of elliptic functions and mathematical physics. His important job is topology. Betty number introduced in 187 1 is an important topological invariant. Under the influence of (G.F.) B. Riemann, he studied mathematical physics, proved Betty's theorem (reciprocal theorem of elasticity), and applied Green's method to elasticity theory and heat. He is one of the people who played an important role in post-renaissance mathematics. The paper is included in Mathematical Works (2 volumes, 1903 ~ 19 15).

2. Actor

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Betty is an actress, porn star and singer in Taiwan Province province. Bai Hansi was born in 195 1 and came from Yilan, Taiwan Province. After taking part in the singing competition, she joined the China Art Troupe and performed in Hongkong. She was appreciated by Chu Yuan, the director who worked at Shaw at that time, and invited her to star in Love Slave with He Lili. This is the first lesbian film in China film history, which also attracted the attention of the international film industry and won the Cannes Film Festival Award. Betty's image of Leng Yan in Love Slave was very popular, so she became a Shaw signed actor and stayed in Hong Kong for development, which opened the door for artists from Taiwan Province Province to go to Hong Kong for development. During her stay in Hongkong, she appeared in many films, including Romantic Tan, Angry Youth, Wang Wu, Agent Peach, Chu Liuxiang and so on. She left Shaw on 1974, returned to Taiwan Province Province for development, continued to participate in film and television performances, and retired on 198 1. Now she has started her own gourmet career kingdom. Main works: Love Slave (1972), Romantic Wonder (1972), Peach Agent (1973), Fenqing (1973), Sword of Wang Wu (1973).

3. Cartoon characters

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Betty Boop, born in1930s, is a cartoon character designed and produced by Fleischer Brothers Studio in new york, USA. Betty was originally portrayed as a dog with a human body, mainly playing the role of the girlfriend of Bimbo, the puppy in the film at that time. Soon after her debut, Betty quickly became popular, replacing Bimbo as the protagonist of many works. Betty, a lovely, sexy and charming doll, her charm comes from her sexy, naive, immature and sophisticated contradictory personality and her ever-changing amorous feelings. Betty has experienced many different roles, such as dancer, doctor, nurse, singer, pilot, circus performer and racing driver. Up to now, she has been infatuated with people for a long time, and the goods belonging to her keep pouring in, such as clothes, cosmetics, dolls, stationery, leather goods, tableware, clocks and watches, daily necessities and so on. They are popular commodities in Europe, America, Japan and Taiwan Province Province, which shows Betty's charm.