Formal theory of irregular linear difference equations

[1] On the irregular cases of the linear ordinary difference equation [J]. TRANSACTIONS OF THE AMERICAN MATHEMATICAL SOCIETY, 1928, 30 (1-4) : 507 - 541

[2] NORLUND N, 1924, DIFFERENZENRECHNUNG, pCH10

[3] NORLUND NE, DIFFERENZENRECHNUNG, pCH11

[4] NORLUND NE, DIFFERENZENRECHNUNG, P312

[5] 1911, T AM MATH SOC, V12, P243

[6] 1913, P AM ACAD ARTS SCI, V49, P521

[1] On the irregular cases of the linear ordinary difference equation [J]. TRANSACTIONS OF THE AMERICAN MATHEMATICAL SOCIETY, 1928, 30 (1-4) : 507 - 541

[2] NORLUND N, 1924, DIFFERENZENRECHNUNG, pCH10

[3] NORLUND NE, DIFFERENZENRECHNUNG, pCH11

[4] NORLUND NE, DIFFERENZENRECHNUNG, P312

[5] 1911, T AM MATH SOC, V12, P243

[6] 1913, P AM ACAD ARTS SCI, V49, P521