necessarynecessary and sufficientnecessary and sufficient conditionnecessary conditionnecessary condition for convergencenecessary condition of law of large numbersnecessary premissesnecessityneckneckingneededneedleneedle problemnegatenegationnegation of a propositionnegation of a statementnegativenegative anglenegative binomialnegative binomial distributionnegative curvaturenegative cutnegative definitenegative definite formnegative definite matrixnegative dependency of eventsnegative directionnegative exponentnegative feedbacknegative infinitynegative integernegative integer partnegative multinomialnegative multinomial distributionnegative numbernegative numbersnegative of a rational integernegative orientationnegative partnegative part of a functionnegative part of a random variablenegative particular propositionnegative powernegative propositionnegative quantitynegative rational numbernegative rootnegative semi definite matrixnegative semidefinite