The positive part function, also known as the ramp function, is similar to the identity function, except that for all negative numbers the number 0 is returned instead of the original value. Integral Edit The indefinite integral of the positive part function is the positive part of halved square function, plus an arbitrary constant of integration. = Ad blocker interference detected! Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected. Categories: Add category Cancel Save