The directories contain:

Original: This is the file containing the original submission from
          Lyness and Hines that accompanied their Algorithm article:

              Algorithm 639: To Integrate Some Infinite Oscillating Tails
              ACM TOMS, 12(1), pp 24-25, March 1968.

Comment: This is a tidied up version of the original code and a
         translation into Fortran 90. The problems found and their solutions
         are detailed in:

              A Comment on the Presentation and Testing of CALGO
              Codes and a Remark on Algorithm 639: To Integrate Some
              Inﬁnite Oscillating Tails; Tim Hopkins; ACM TOMS,
              Vol. 28, No. 3, September 2002, Pages 285–300

         This directory aldo contains all the input data and test results.

CALGO_CD: This contains a tidied up Fortran 77 version of the code in Original
         with drivers, test data and results. This is an interim
         version between the Original and Comment vesrions.

The file src_715.f that appears in the Drivers directory is a copy of the
CALGO Algorithm 715 which is used in the new testing of Algorithm 639.

Tim Hopkins
9 March 2024
