The purpose of this Note is to highlight the spectral instability of some non-selfadjoint differential operators, by studying the growth rate of the norms of the spectral projections Π_n associated with their eigenvalues. More precisely, we are concerned with some anharmonic oscillators A(m,θ)=-d~2/dx~2+e~(iθ)|x|~m with |θ|展开▼
机译：本注释的目的是通过研究与光谱谱特征值相关的光谱投影_n范数的增长率来突出一些非自伴微分算子的光谱不稳定性。更确切地说，我们关注一些非谐振荡器A（m，θ）=-d〜2 / dx〜2 + e〜（iθ）| x |〜m，其中|θ| 展开▼
