Molecular structure of diaquo-.alpha.,.beta.,.gamma.,.delta.-tetraphenylporphinatoiron(III) perchlorate and perchlorato-.alpha.,.beta.,.gamma.,.delta.-tetraphenylporphinatoiron(III). Two new structural types for iron(III) porphyrins

1978 ◽  
Vol 100 (2) ◽  
pp. 666-667 ◽  
Author(s):  
M. E. Kastner ◽  
W. Robert Scheidt ◽  
Toshio Mashiko ◽  
Christopher A. Reed
2020 ◽  
Vol 2020 (1) ◽  
Author(s):  
Abhishek Mishra ◽  
Vishnu Narayan Mishra ◽  
M. Mursaleen

AbstractIn this paper, we establish a new estimate for the degree of approximation of functions $f(x,y)$ f ( x , y ) belonging to the generalized Lipschitz class $Lip ((\xi _{1}, \xi _{2} );r )$ L i p ( ( ξ 1 , ξ 2 ) ; r ) , $r \geq 1$ r ≥ 1 , by double Hausdorff matrix summability means of double Fourier series. We also deduce the degree of approximation of functions from $Lip ((\alpha ,\beta );r )$ L i p ( ( α , β ) ; r ) and $Lip(\alpha ,\beta )$ L i p ( α , β ) in the form of corollary. We establish some auxiliary results on trigonometric approximation for almost Euler means and $(C, \gamma , \delta )$ ( C , γ , δ ) means.


1989 ◽  
Vol 111 (1) ◽  
pp. 5-33 ◽  
Author(s):  
Pedro Aparicio ◽  
Jose Maria Alonso ◽  
Maria Luisa Toribio ◽  
Jose Carlos Gutierrez ◽  
Luis Pezzi ◽  
...  

1999 ◽  
Vol 11 (4) ◽  
pp. 239-249 ◽  
Author(s):  
Adrian C. Hayday ◽  
Domingo F. Barber ◽  
Nataki Douglas ◽  
Eric S. Hoffman

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