Sự Tăng Trưởng của Các Giải Phương Trình Vi Phân Bậc Cao với Các Đa Thức Số Mũ Là Hệ Số

Acta Mathematica Scientia - Tập 43 - Trang 439-449 - 2022
Zhibo Huang1, Minwei Luo1, Zongxuan Chen1
1School of Mathematical Sciences, South China Normal University, Guangzhou, China

Tóm tắt

Bằng cách xem xét tình huống khi các hệ số Pj(z) (j = 1, 2, ⋯, n − 1) (hoặc hầu hết trong số chúng) là các đa thức số mũ, chúng tôi điều tra thực tế rằng tất cả các nghiệm không tầm thường của các phương trình vi phân bậc cao f(n) + Pn−1(z)f(n−1) + ⋯ + P0(z)f = 0 đều có bậc vô hạn. Hệ số đa thức số mũ đóng vai trò quan trọng trong những kết quả này.

Từ khóa

#Phương trình vi phân bậc cao #Đa thức số mũ #Nghiệm không tầm thường #Bậc vô hạn

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