RLSStruct(# the_set_of_l2RealSequences,(Zero_ (the_set_of_l2RealSequences,Linear_Space_of_RealSequences)),(Add_ (the_set_of_l2RealSequences,Linear_Space_of_RealSequences)),(Mult_ (the_set_of_l2RealSequences,Linear_Space_of_RealSequences)) #) is RealLinearSpace by Th4;