The Heaviside function, often written as "H"(x), is a non-continuous function whose value is zero for a negative input and one for a positive input.
ð ə WORD_BOUNDARY h ɛ v ɪ s aɪ d WORD_BOUNDARY f ʌ ŋ k ʃ ə n WORD_BOUNDARY ɔ f ə n WORD_BOUNDARY ɹ ɪ t ə n WORD_BOUNDARY æ z WORD_BOUNDARY eɪ t̠ʃ WORD_BOUNDARY ɛ k s WORD_BOUNDARY ɪ z WORD_BOUNDARY ʌ WORD_BOUNDARY n ɑ ŋ k ə n t ɪ n j uː ə s WORD_BOUNDARY f ʌ ŋ k ʃ ə n WORD_BOUNDARY h uː z WORD_BOUNDARY v æ l j uː WORD_BOUNDARY ɪ z WORD_BOUNDARY z iə ɹ oʊ WORD_BOUNDARY f ə ɹ ɹ ə WORD_BOUNDARY n ɛ ɡ ə t ɪ v WORD_BOUNDARY ɪ n p ʊ t WORD_BOUNDARY æ n d WORD_BOUNDARY w ʌ n WORD_BOUNDARY f ə ɹ ɹ ə WORD_BOUNDARY p ɑ z ɪ t ɪ v WORD_BOUNDARY ɪ n p ʊ t WORD_BOUNDARY