Теория возмущений в линейной алгебре / К первой паре / Аналитические приближенные методы / Лекция 17

In quantum mechanics problems, the need often arises to use an operator representation of the evolution of states. In this case, the description of the system's state can be represented by a vector, and its evolution is reduced to a matrix representation. This article discusses the approximate determination of eigenvectors and eigenvalues ​​of normal matrices, as well as how and in what cases perturbation theory can be used for this problem. We will discuss corrections to both non-singular and singular eigenvalues ​​of matrices. Enjoy watching ✨ Watch other lectures from the course in the playlist:    • К первой паре. Аналитические приближенные ...   🎓 Physics Educational Program: https://clck.ru/3ReGAF 💻 HSE Online Website: https://clck.ru/3ReGCj 🔗 We're on Telegram: https://t.me/onlinedegreesHSE 📨 We're on VKontakte: https://vk.com/vyshkaonline 📹 We're on RuTube: https://rutube.ru/channel/40229925/ 📄 We're on VC.ru: https://vc.ru/u/1427995-vyshka-onlain 🧘🏻 We're on Zen: https://dzen.ru/hseonline 🖇 We're at MAX: https://max.ru/onlinedegreesHSE