# isolated essential

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## 11—17 of 17 matching pages

##### 11: DLMF Project News

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##### 12: Bibliography K

##### 13: 2.4 Contour Integrals

##### 14: 19.36 Methods of Computation

##### 15: 32.10 Special Function Solutions

##### 16: 9.13 Generalized Airy Functions

##### 17: Errata

There has been disagreement about the identification of the Chebyshev polynomials of the third and fourth kinds, denoted ${V}_{n}\left(x\right)$ and ${W}_{n}\left(x\right)$, in published references. Originally, DLMF used the definitions given in (Andrews et al., 1999, Remark 2.5.3). However, those definitions were the reverse of those used by Mason and Handscomb (2003), Gautschi (2004) following Mason (1993) and Gautschi (1992), as was noted in several warnings added in Version 1.0.10 (August 7, 2015) of the DLMF. Since the latter definitions are more widely established, the DLMF is now adopting the definitions of Mason and Handscomb (2003). Essentially, what we previously denoted ${V}_{n}(x)$ is now written as ${W}_{n}(x)$, and vice-versa.