Geodesic
Justification of the averaging method for parabolic equations containing rapidly
Izvestiya. Mathematics , Tome 70 (2006) no. 2, pp. 233-263

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We justify the averaging method for abstract parabolic equations with stationary principal part that contain non-linearities (subordinate to the principal part) some of whose terms are rapidly oscillating in time with zero mean and are proportional to the square root of the frequency of oscillation. Our interest in the exponent 1/2 is motivated by the fact that terms proportional to lower powers of the frequency have no influence on the average. For linear equations of the same type, we justify an algorithm for the study of the stability of solutions in the case when the stationary averaged problem has eigenvalues on the imaginary axis (the critical case). 
@article{IM2_2006_70_2_a1,
     author = {V. B. Levenshtam},
     title = {Justification of the averaging method for parabolic equations containing rapidly},
     journal = {Izvestiya. Mathematics },
     pages = {233--263},
     publisher = {mathdoc},
     volume = {70},
     number = {2},
     year = {2006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2006_70_2_a1/}
}
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V. B. Levenshtam. Justification of the averaging method for parabolic equations containing rapidly. Izvestiya. Mathematics , Tome 70 (2006) no. 2, pp. 233-263. http://geodesic.mathdoc.fr/item/IM2_2006_70_2_a1/