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Network Working Group                                         S. CrockerRequest for Comments: #154                                          UCLANIC: #6759                                                   12 May 1971Categories: C.4Updates: #107Obsoletes: #132Exposition StyleAs a pedagogical device for describing functions such as the onebelow           |           |                  +-----------------           |                 /:           |                / :           |               /  :           |              /   :           |             /    :           |            /     :      -----+------------------------------------           |                  a           |where two formulae, f1 and f2, are necessary for adjoining domains butthe function is continous at the boundary point, I usually write thedescription in the form        f(x) = f1(x) for x =< a        f(x) = f2(x) for x >= aThe astute reader will note that the domains overlap, but thatf1(a) = f2(a), so no semantic ambiguity obtains.     [ This RFC was put into machine readable form for entry ]     [ into the online RFC archives by Naoki Matsuhira 5/97 ]Crocker                                                         [Page 1]