Which Joe gave his name to ‘sloppy joes’? We look at five interesting sandwiches and their lexical origins.
An infinite series of trigonometric functions which represents an expansion or approximation of a periodic function, used in Fourier analysis.
- ‘His work led him to study the acceleration of convergence of Fourier series and the approximate solutions to differential equations.’
- ‘He carried out many important and fruitful investigations in number theory, in the theory of Bessel functions and of Fourier series, in ordinary and partial differential equations, and in analytical mechanics and potential theory.’
- ‘In mathematics he worked on the calculus of variations, Fourier series, function spaces, Hamiltonian geometrical optics, Schrödinger wave mechanics, and relativity.’
- ‘Hardy's interests covered many topics of pure mathematics - Diophantine analysis, summation of divergent series, Fourier series, the Riemann zeta function, and the distribution of primes.’
- ‘From this he was able to prove that if a function was representable by a trigonometric series then this series is necessarily its Fourier series.’
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.