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Singular parabolic equations with interior degeneracy and non smooth coefficients: The Neumann case

## A generalized Cox-Ingersoll-Ross equation with growing initial conditions

 1 Department of Mathematical Sciences, University of Memphis, Memphis, 373 Dunn Hall, TN 38152-3240, USA 2 Department of Mathematics, University of Bari Aldo Moro, Via E. Orabona 4, 70125 Bari, Italy

To Angelo Favini, a great mathematician and friend

Received  February 2018 Revised  September 2018 Published  June 2019

In this paper we solve the problem of the existence and strong continuity of the semigroup associated with the initial value problem for a generalized Cox-Ingersoll-Ross equation for the price of a zero-coupon bond (see [8]), on spaces of continuous functions on
 $[0, \infty)$
which can grow at infinity. We focus on the Banach spaces
 $Y_{s} = \left\{f\in C[0,\infty): \dfrac{f(x)}{1+x^{s}}\in C_0[0,\infty)\right\},\qquad s\ge 1,$
which contain the nonzero constants very common as initial data in the Cauchy problems coming from financial models. In addition, a Feynman-Kac type formula is given.
Citation: Giséle Ruiz Goldstein, Jerome A. Goldstein, Rosa Maria Mininni, Silvia Romanelli. A generalized Cox-Ingersoll-Ross equation with growing initial conditions. Discrete & Continuous Dynamical Systems - S, doi: 10.3934/dcdss.2020085
##### References:
 [1] F. Black and M. Scholes, The pricing of options and corporate liabilities, J. Polit. Econ, 81 (1973), 637-654. doi: 10.1086/260062. Google Scholar [2] H. Brezis, W. Rosenkrantz and B. Singer (with an appendix by P.D. Lax), On a degenerate elliptic-parabolic equation occurring in the theory of probability, Comm. Pure Appl. Math., 24 (1971), 395–416. doi: 10.1002/cpa.3160240305. Google Scholar [3] J. C. Cox, J. E. Ingersoll and S. A. Ross, A theory of the term structure of interest rates, Econometrica, 53 (1985), 385-407. doi: 10.2307/1911242. Google Scholar [4] D. Duffie, D. Filipović and W. Schachermayer, Affine processes and applications in finance, Ann. Appl. Probab., 13 (2003), 984-1053. doi: 10.1214/aoap/1060202833. Google Scholar [5] R. J. Duffin, E. L. Peterson and C. Zener, Geometric Programming, John Wiley, New York, 1967. Google Scholar [6] H. Emamirad, G. R. Goldstein and J. A. Goldstein, Chaotic solution for the Black-Scholes equation, Proc. Amer. Math. Soc., 140 (2012), 2043-2052. doi: 10.1090/S0002-9939-2011-11069-4. Google Scholar [7] H. Emamirad, G. R. Goldstein and J. A. Goldstein, Corrigendum and improvement for "Chaotic solution for the Black-Scholes equation", Proc. Amer. Math. Soc., 142 (2014), 4385-4386. doi: 10.1090/S0002-9939-2014-12135-6. Google Scholar [8] G. R. Goldstein, J. A. Goldstein, R. M. Mininni and S. Romanelli, The semigroup governing the generalized Cox-Ingersoll-Ross equation, Adv. Differential Equations, 21 (2016), 235-264. Google Scholar [9] J. A. Goldstein, Cosine functions and the Feynman-Kac Formula, Quart. J. Math. Oxford, 33 (1982), 303-307. doi: 10.1093/qmath/33.3.303. Google Scholar [10] J. A. Goldstein, Semigroups of Linear Operators and Applications, 2$^{nd}$ expanded edition, Dover Publications, 2017. Google Scholar [11] J. A. Goldstein, R. M. Mininni and S. Romanelli, Markov semigroups and groups of operators, Commun. Stoch. Anal., 1 (2007), 247-262. doi: 10.31390/cosa.1.2.05. Google Scholar [12] R. R. Kallman and G.-C. Rota, On the inequality $||f'||\le 4 ||f||\cdot||f''||$, in Inequalities, II (ed. O. Shisha), Academic Press, (1970), 187–192. Google Scholar

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##### References:
 [1] F. Black and M. Scholes, The pricing of options and corporate liabilities, J. Polit. Econ, 81 (1973), 637-654. doi: 10.1086/260062. Google Scholar [2] H. Brezis, W. Rosenkrantz and B. Singer (with an appendix by P.D. Lax), On a degenerate elliptic-parabolic equation occurring in the theory of probability, Comm. Pure Appl. Math., 24 (1971), 395–416. doi: 10.1002/cpa.3160240305. Google Scholar [3] J. C. Cox, J. E. Ingersoll and S. A. Ross, A theory of the term structure of interest rates, Econometrica, 53 (1985), 385-407. doi: 10.2307/1911242. Google Scholar [4] D. Duffie, D. Filipović and W. Schachermayer, Affine processes and applications in finance, Ann. Appl. Probab., 13 (2003), 984-1053. doi: 10.1214/aoap/1060202833. Google Scholar [5] R. J. Duffin, E. L. Peterson and C. Zener, Geometric Programming, John Wiley, New York, 1967. Google Scholar [6] H. Emamirad, G. R. Goldstein and J. A. Goldstein, Chaotic solution for the Black-Scholes equation, Proc. Amer. Math. Soc., 140 (2012), 2043-2052. doi: 10.1090/S0002-9939-2011-11069-4. Google Scholar [7] H. Emamirad, G. R. Goldstein and J. A. Goldstein, Corrigendum and improvement for "Chaotic solution for the Black-Scholes equation", Proc. Amer. Math. Soc., 142 (2014), 4385-4386. doi: 10.1090/S0002-9939-2014-12135-6. Google Scholar [8] G. R. Goldstein, J. A. Goldstein, R. M. Mininni and S. Romanelli, The semigroup governing the generalized Cox-Ingersoll-Ross equation, Adv. Differential Equations, 21 (2016), 235-264. Google Scholar [9] J. A. Goldstein, Cosine functions and the Feynman-Kac Formula, Quart. J. Math. Oxford, 33 (1982), 303-307. doi: 10.1093/qmath/33.3.303. Google Scholar [10] J. A. Goldstein, Semigroups of Linear Operators and Applications, 2$^{nd}$ expanded edition, Dover Publications, 2017. Google Scholar [11] J. A. Goldstein, R. M. Mininni and S. Romanelli, Markov semigroups and groups of operators, Commun. Stoch. Anal., 1 (2007), 247-262. doi: 10.31390/cosa.1.2.05. Google Scholar [12] R. R. Kallman and G.-C. Rota, On the inequality $||f'||\le 4 ||f||\cdot||f''||$, in Inequalities, II (ed. O. Shisha), Academic Press, (1970), 187–192. Google Scholar
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