Charles Hoskinson is an American entrepreneur and mathematician best known as a co-founder of Ethereum, a popular blockchain platform that enables smart contracts and decentralized applications. He is also the founder of Cardano, a blockchain project that aims to provide a more secure and scalable infrastructure for the development of decentralized applications and cryptocurrencies. Hoskinson has a background in mathematics and computer science, which has helped him in his work in the blockchain space. He is an advocate for the use of blockchain technology to improve various industries and has been involved in numerous projects and initiatives aimed at advancing the adoption of cryptocurrencies and decentralized systems.