explanation, account - a statement that makes something comprehensible by describing the relevant structure or operation or circumstances etc.; "the explanation was very simple"; "I expected a brief account"

oversimplification - a simplification that goes too far (to the point of misrepresentation)

elimination, riddance - the act of removing or getting rid of something

oversimplification - excessive simplification; the act of making something too simple (to the point of misrepresentation)

rationalisation, rationalization - (mathematics) the simplification of an expression or equation by eliminating radicals without changing the value of the expression or the roots of the equation

change - the action of changing something; "the change of government had no impact on the economy"; "his change on abortion cost him the election"

schematisation, schematization - the act of reducing to a scheme or formula