Context: He also developed Feynman diagrams, a bookkeeping device that helps in conceptualizing and calculating interactions between particles in spacetime, including the interactions between electrons and their antimatter counterparts, positrons. This device allowed him, and later others, to approach time reversibility and other fundamental processes. Feynman's mental picture for these diagrams started with the hard sphere approximation, and the interactions could be thought of as collisions at first. It was not until decades later that physicists thought of analyzing the nodes of the Feynman diagrams more closely. Feynman painted Feynman diagrams on the exterior of his van.

Question: What did Feynman produce that help in understanding calculations between particles in space and time?
Answer: Feynman diagrams

Question: What is the name of the antimatter counterpart of electrons?
Answer: positrons

Question: Where did Feynman paint his diagrams?
Answer: his van

Question: What did Feynman digrams allow him and others to do?
Answer: approach time reversibility and other fundamental processes

Question: What did Feynman steal that help in understanding calculations between particles in space and time?
Answer: Unanswerable

Question: What is the name of the antiparticle part of electrons?
Answer: Unanswerable

Question: Where did Feynman code his diagrams?
Answer: Unanswerable

Question: What did Feynman diagrams allow nobody to do?
Answer: Unanswerable

Question: What diagrams did Feynman put on the exterior of his truck?
Answer: Unanswerable