Parameters
		----------
		term_doc_matrix : TermDocMatrix
			Term document matrix object to compact

		Returns
		-------
		New term doc matrix

def compact(self, term_doc_matrix):
		'''
		Parameters
		----------
		term_doc_matrix : TermDocMatrix
			Term document matrix object to compact

		Returns
		-------
		New term doc matrix
		'''
		domain_mat = CombineDocsIntoDomains(term_doc_matrix).get_new_term_doc_mat(self.doc_domains)
		domain_count = (domain_mat > 0).sum(axis=0)
		valid_term_mask = (self.max_domain_count >= domain_count) \
		                  & (domain_count >= self.min_domain_count)
		indices_to_compact = np.arange(term_doc_matrix.get_num_terms())[~valid_term_mask.A1]
		return term_doc_matrix.remove_terms_by_indices(indices_to_compact)