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Approximation by means of Convergent Fractions

Published online by Cambridge University Press:  20 January 2009

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This is a note on the theory of continued fractions, in which the chief feature is the use made of the successive remainders or divisors which occur in the reduction of any given ratio to a continued fraction.

The treatment of the Pellian equation also differs from that which is generally given.

Type
Research Article
Copyright
Copyright © Edinburgh Mathematical Society 1910

References

* For the theory, see, for instance, Chrystal's Algebra, chapters 32, 33.

Hence √N − a is positive, that is, a must be <√N or else negative: in the former case x/y is a convergent, ordinary or intermediate, to √N.

* Since Am−2=amAm−1+Am and Am−1 > Am it follows that Am<½Am−2.