Terminological inexactitude to accuse another member of lying is considered unparliamentary. In more recent times, the term was used by Conservative MP Jacob Rees-Mogg to the Leader of the Oppositon, Jeremy Corbyn over an accusation that Rees-Mogg's company had moved a hedge fund into the Eurozone despite him being in favour of Brexit. Terminological inexactitude Terminological inexactitude is a phrase introduced in 1906 by British politician Winston Churchill. Today, it is used as a euphemism or circumlocution meaning a lie or untruth. Churchill first used the phrase following the 1906 election. Speaking in the House of Commons on 22 February 1906 as
Radical of a Lie algebra Radical of a Lie algebra In the mathematical field of Lie theory, the radical of a Lie algebra formula_1 is the largest solvable ideal of formula_2 Let formula_3 be a field and let formula_1 be a finite-dimensional Lie algebra over formula_3. There exists a unique maximal solvable ideal, called the "radical," for the following reason. Firstly let formula_6 and formula_7 be two solvable ideals of formula_1. Then formula_9 is again an ideal of formula_1, and it is solvable because it is an extension of formula_11 by formula_6. Now consider the sum of all the solvable ideals of formula_1. It is