for seq1, seq2 being V184() ExtREAL_sequence holds
( ( seq1 is convergent_to_+infty & seq2 is convergent_to_+infty implies ( seq1 + seq2 is convergent_to_+infty & seq1 + seq2 is convergent & lim (seq1 + seq2) = +infty ) ) & ( seq1 is convergent_to_+infty & seq2 is convergent_to_finite_number implies ( seq1 + seq2 is convergent_to_+infty & seq1 + seq2 is convergent & lim (seq1 + seq2) = +infty ) ) & ( seq1 is convergent_to_-infty & seq2 is convergent_to_-infty implies ( seq1 + seq2 is convergent_to_-infty & seq1 + seq2 is convergent & lim (seq1 + seq2) = -infty ) ) & ( seq1 is convergent_to_-infty & seq2 is convergent_to_finite_number implies ( seq1 + seq2 is convergent_to_-infty & seq1 + seq2 is convergent & lim (seq1 + seq2) = -infty ) ) & ( seq1 is convergent_to_finite_number & seq2 is convergent_to_finite_number implies ( seq1 + seq2 is convergent_to_finite_number & seq1 + seq2 is convergent & lim (seq1 + seq2) = (lim seq1) + (lim seq2) ) ) )