2 covering for the human body most of the celebrants of the town's bicentennial will be in festive rigâso don't show up in jeans Synonyms apparel, attire, clobber [British slang], clothes, costumery, dress, duds, garments, gear, habiliment(s), habit [archaic], rags, raiment, clothing, rigging, threads, toggery, togs, vestiary, vestments, vesture, ...
It is therefore called the triple point of the substance, and it represents the only point in the phase diagram in which all three states are in equilibrium. Point C is the critical point of the substance, which is the highest temperature and pressure at which a gas and a liquid can coexist at equilibrium. The figure below shows what happens when we draw a horizontal line across a phase diagram at a pressure of exactly 1 atm.
If f''(x_c)>0, then x_c is a relative minimum. If f''(x_c)<0, then x_c is a maximum. If f''(x_c)=0, then the test gives no information. The notions of critical points and the second derivative test carry over to functions of two variables. Let z=f(x,y). Critical points are points in the xy-plane where the tangent plane is horizontal.