Which Joe gave his name to ‘sloppy joes’? We look at five interesting sandwiches and their lexical origins.
An infinite-dimensional analogue of Euclidean space.
- ‘His theorem, now called the Riesz - Fischer theorem, which he proved in 1907, is fundamental in the Fourier analysis of Hilbert space.’
- ‘He took various ideas of Hilbert on integral equations and combined these into the concept of a Hilbert space around 1905.’
- ‘They showed that these rings could always be represented as a ring of linear operators on a Hilbert space.’
- ‘In 1943 he proved the Gelfand Naimark theorem on self-adjoint algebras of operators in Hilbert space.’
- ‘In short, to have any hope of understanding what a Hilbert space is, you must learn and digest a whole hierarchy of lower-level concepts first.’
Early 20th century: named after David Hilbert (1862–1943), German mathematician.
We take a look at several popular, though confusing, punctuation marks.
From Afghanistan to Zimbabwe, discover surprising and intriguing language facts from around the globe.
The definitions of ‘buddy’ and ‘bro’ in the OED have recently been revised. We explore their history and increase in popularity.