Directions in computer algebra

Once classic problems are now routine.


Calculation of detg, g^{a b}, R_{a b c d}, R_{a b}, R, G_{a b} in the Bondi metric.^*

System	Machine	CPU Time	Year
Grad-Assist	IBM 7090	1020	1969
ALAM	ATLAS 1	240	1969
FORMAC	IBM 7094	1800	1969
FORMAC	IBM 370/165	15	1971
CLAM	CDC 6600	18	1971
CAMAL	TITAN	140	1972
Reduce	DEC KA 10	360	1972
LAM	IBM 360/75	104	1975
Reduce	IBM 360/75	856	1976
FORMAC	IBM 360/75	162	1976
CAMAL(n)	IBM 360/75	16	1977
CAMAL	IBM 360/75	32	1977
SHEEP	DEC KA 10	30	1977
MACSYMA	DEC KL 10	73	1979

^*Information provided by R.A. d'Inverno

Run the example on your machine (Typical time is 5/100 sec)