Original
If {{MATH_612}} for all {{MATH_613}} that are near and to the left of {{MATH_614}} and {{MATH_615}} for all {{MATH_616}} that are near and to the right of
{{MATH_617}}, then the function {{MATH_618}} has a local maximum at {{MATH_619}}.
{{CMD_620}} If {{MATH_621}} for all {{MATH_622}} that are near and to the left of {{MATH_623}} and {{MATH_624}} for all {{MATH_625}} that are near and to the right of
{{MATH_626}}, then the function {{MATH_627}} has a local minimum at {{MATH_628}}.
{{CMD_629}}