Hans Jørgen Uldall in the context of "Danish people"

Louis Trolle Hjelmslev (Danish: [ˈjelˀmsle̝w]; 3 October 1899 – 30 May 1965) was a Danish linguist whose ideas formed the basis of the Copenhagen School of linguistics. Born into an academic family (his father was the mathematician Johannes Hjelmslev), Hjelmslev studied comparative linguistics in Copenhagen, Prague and Paris (with Antoine Meillet and Joseph Vendryes, among others). In 1931, he founded the Cercle Linguistique de Copenhague. Together with Hans Jørgen Uldall he developed a structuralist theory of language which he called glossematics, which further developed the semiotic theory of Ferdinand de Saussure. Glossematics as a theory of language is characterized by a high degree of formalism. It is interested in describing the formal and semantic characteristics of language in separation from sociology, psychology or neurobiology, and has a high degree of logical rigour. Hjelmslev regarded linguistics – or glossematics – as a formal science. He was a pioneer of formal linguistics. Hjelmslev's theory became widely influential in structural and functional grammar, and in semiotics.

In linguistics, glossematics is a structuralist theory proposed by Louis Hjelmslev and Hans Jørgen Uldall. It defines the glosseme as the most basic unit of language.

Hjelmslev and Uldall eventually went separate ways with their respective approaches. Hjelmslev's theory, most notably, is an early mathematical methodology for the analysis of language which was subsequently incorporated into the analytical foundation of current models of functional–structural grammar such as Danish Functional Grammar, Functional Discourse Grammar and Systemic Functional Linguistics. Hjelmslev's theory likewise remains fundamental for modern semiotics.