Pi was invented by William Jones in 1706 who was a Welsh mathematician.
Charles Babbage in Victorian times. his computer would have been mechanical, rather than electronic.
Sir Isaac Newton. He and Leibniz both invented the calculus independently.
Invented by English mathematician Robert Recorde. That's all i know.
Isaac Newton
interpolation theorem, discovered by Józef Marcinkiewicz
It wasn't an English man but it was a Welsh mathematician by the name of Robert Recorde who in 1557 invented the equality symbol and it has 2 equal parallel lines
The clinometer was invented by Leonard Digges, an English mathematician and surveyor, in the 16th century. He utilized it for measuring angles and determining heights.
The work Charles Babbage is most famous for creating the programmable computer. He was an English polymath known for as a mathematician, philosopher, inventor and mechanical engineer. He was considered as the father of the computer.
It wasn't an English man but it was a Welsh mathematician by the name of Robert Recorde who in 1557 invented the equality symbol and it has 2 equal parallel lines
The English mathematician John Wallis (1616 - 1703).
Charles Babbage, an English mathematician, suggested in 1822 that a mechanical machine could do calculations, just like our modern computers and calculators. He began working on the Difference Engine. Then he got a better idea for the Analytical Engine and worked on it from 1842. He never really finished it properly.