NUMBER 1

1. Masaki Kawamoto:
   $L^2$-properties for linearized KdV equation around small solutions
2. Genki Koda:
   Representation of the norm of ideals by quadratic forms with congruence conditions
3. Kengo Fujisawa ans Kouji Tahara:
   Asymmetry model based on $f$-divergence and orthogonal decomposition of symmetry for square contingency tables with ordinal categories
4. Jay Prakash Singh and Kingbawl Lalnunsiami:
   Certain curvature properties of $N(k)$-quasi Einstein manifolds

CONTENTS OF NUMBER 1

• contents56-1.pdf

EDITORIAL BOARD

• board56-1.pdf

NUMBER 2

1. Mahouton Norbert Hounkonnou and Mafoya Landry Dassoundo:
   $q$-generalized (anti -) flexible algebras and bialgebras
2. Keiichi Kikuchi and Tsukasa Takeuchi:
   Examples of 4-dimensional symplectic-Haantjes manifolds
3. Silvestru Sever Dragomir:
   Some inequalities for weighted and integral means of operator convex functions
4. Toshiya Iwashita and Bernhard Klar:
   A necessary test for elliptical symmetry based on the uniform distribution over the Stiefel manifold
   
5. Nobuhiro Terai and Yoshiki Shinsho:
   On the exponential Diophantine equation $(3m^2 + 1)^x + (qm^2 − 1)^y = (rm)^z$
6. Krishnendu De:
   $\alpha$-almost Ricci solitons On Kenmotsu manifolds
7. Nobukatsu Watanabe:
   Lifting Brauer-friendly modules

CONTENTS OF NUMBER 2

• contents56-2.pdf

EDITORIAL BOARD

• board56-2.pdf

Contents of Volume 56

• contents56.pdf