# Leonhard Euler | ![img \|150](https://upload.wikimedia.org/wikipedia/commons/thumb/d/d7/Leonhard_Euler.jpg/320px-Leonhard_Euler.jpg) | **Leonhard Euler** was a Swiss mathematician, physicist, astronomer, geographer, logician, and engineer who founded the studies of graph theory and topology and made pioneering and influential discoveries in many other branches of mathematics such as analytic number theory, complex analysis, and infinitesimal calculus. He introduced much of modern mathematical terminology and notation, including the notion of a mathematical function. He is also known for his work in mechanics, fluid dynamics, optics, astronomy, and music theory. | |-|-| | | wikipedia:: [Leonhard Euler](https://en.wikipedia.org/wiki/Leonhard_Euler) | --- ## Other Notes Related to `= this.file.name`, `= this.of` or `= this.for` or `= this.re` or `= this.in` ```dataview TABLE WITHOUT ID file.link AS Name, in AS In, of AS Of, for AS For, re AS Re, as AS As, contact AS Contact, url AS URL, date AS Date FROM #Type WHERE ( ( any(contains(for, this.for)) OR any(contains(of, this.for)) OR any(contains(by, this.for)) OR any(contains(in, this.for)) OR any(contains(re, this.for)) OR any(contains(as, this.for)) AND this.for ) OR ( any(contains(of, this.of)) OR any(contains(for, this.of)) OR any(contains(by, this.of)) OR any(contains(in, this.of)) OR any(contains(re, this.of)) OR any(contains(as, this.of)) AND this.of ) OR ( any(contains(of, this.in)) OR any(contains(for, this.in)) OR any(contains(by, this.in)) OR any(contains(in, this.in)) OR any(contains(re, this.in)) OR any(contains(as, this.in)) AND this.in ) OR ( any(contains(of, this.as)) OR any(contains(for, this.as)) OR any(contains(by, this.as)) OR any(contains(in, this.as)) OR any(contains(re, this.as)) OR any(contains(as, this.as)) AND this.as ) OR ( any(contains(for, this.file.name)) OR any(contains(for, this.file.link)) OR any(contains(of, this.file.name)) OR any(contains(of, this.file.link)) OR any(contains(in, this.file.name)) OR any(contains(in, this.file.link)) OR any(contains(by, this.file.name)) OR any(contains(by, this.file.link)) OR any(contains(re, this.file.name)) OR any(contains(re, this.file.link)) OR any(contains(as, this.file.name)) OR any(contains(as, this.file.link)) ) AND file.name !=this.file.name ) SORT file.etags DESC, date DESC, file.link ASC ```