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The Practical Calculation of Annuities for any Number of Joint Lives on a Mortality Table Following the Double Geometric Law; With Notes on Some Associated Laws and on the Form of the Curve of μx
Published online by Cambridge University Press: 18 August 2016
Abstract
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- Copyright © Institute and Faculty of Actuaries 1935
References
page 413 note * Cf. Hardy's Lectures, p. 68. Hardy did not include the constant A, but as this is equivalent to an addition to the force of discount, 8, it does not affect the values of w and k or the form of the calculation.
page 414 note *
The sums all embrace m terms, of which in the case of and
the first is I = c° = n°.
page 416 note * Except at very advanced ages—see post, p. 417.
page 419 note * King and Reid's equation, loc. cit. p. III, will yield an indefinite number of such solutions (in addition to the real solutions considered by them) if βx > αγ, which is the case in their example.
page 420 note *
Here cos aø begins with the term c° cos 0 = 1.
pge 422 note * If d be the number of degrees in ϕ, we have ϕ=d/57·29578; also
![](https://static.cambridge.org/binary/version/id/urn:cambridge.org:id:binary:20160908043237754-0238:S0020268100034284_eqnU1.gif?pub-status=live)
Hence for practical calculation it will be convenient to write
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The common log of ·00757987 is 3·8796617. In such calculations it is convenient to use trigonometric tables with arguments in radians or in decimal form; see list, T.F.A. Vol. x, 344.
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