Abstract
In mathematics textbooks, variables usually take any real value (i.e. they ‘go from −∞ to +∞’). In modelling this is never so because:
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1.
Variables represent real quantities and have practical upper and lower limits, and in many cases negative values are physically meaningless.
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2.
Models have a limited domain of applicability, outside of which some of the assumptions break down and the model should not be used.
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© 1996 D. Edwards & M. J. Hamson
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Edwards, D., Hamson, M. (1996). Continuous Models. In: Mathematical Modelling Skills. Macmillan College Work Out Series. Palgrave, London. https://doi.org/10.1007/978-1-349-13250-8_6
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DOI: https://doi.org/10.1007/978-1-349-13250-8_6
Publisher Name: Palgrave, London
Print ISBN: 978-0-333-59595-4
Online ISBN: 978-1-349-13250-8
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