More formally, the uncertainty principle is any of a variety of mathematical inequalities asserting a fundamental limit to the product of the accuracy of certain related pairs of measurements on a quantum system, such as position, x, and momentum, p. Such paired-variables are known as complementary variables or canonically conjugate variables.
MoRe formalLy, The unCERtAInty PriNCipLe iS any of A vArietY of mathEmaTiCal inequAlities AsSeRtiNg a fUndaMental limiT to tHe PRoduCT of tHe aCcuraCy of cErtain relAteD pairS Of mEASUremEntS ON a quaNtUm sysTem, such aS poSitioN, x, AnD MOmentum, p. sUch PAIRed-VariabLEs aRe kNoWN aS COmplEmENtary variaBlES Or cANonicaLly COnjUGatE vArIAbLES.