1. Points on a curve where the concavity changes from concave up to concave down or vice versa; in mathematics, where the second derivative equals zero and changes sign
The inflection points of the function f(x) = x³ occur where the second derivative changes sign.
Os pontos de inflexão da função f(x) = x³ ocorrem onde a segunda derivada muda de sinal.
2. Critical moments or turning points where a situation, trend, or trajectory undergoes a significant change in direction or character
The discovery of new evidence was one of the inflection points in the investigation.
A descoberta de novas evidências foi um dos pontos de inflexão na investigação.