The articles below have been selected as cover articles for 2022 by the Editorial Office of Symmetry (ISSN: 2073-8994). They include liquid crystal, magnetic resonance imaging (MRI), protein asymmetry, ferroelectrics, gravitational waves and neutrino physics in the first half of the year; in the second half of the year, they include linear operators, metal catalysis, quantum electrodynamics, geometric measure theory, qubit arrays and the Pt-Mn₂O₃ catalyst. We hope it provides insights and references to scholars in related fields.

1. “Analysis of Electro-Optical Behavior in Liquid Crystal Cells with Asymmetric Anchoring Strength”
by Rumiko Yamaguchi
Symmetry 2022, 14(1), 85; https://doi.org/10.3390/sym14010085
Available online: https://www.mdpi.com/2073-8994/14/1/85

2. “Longitudinal Observation of Asymmetric Iron Deposition in an Intracerebral Hemorrhage Model Using Quantitative Susceptibility Mapping”
by Keiho Tsuji, Ryutarou Onishi, Reika Sawaya, Narumi Arihara, Junpei Ueda and Shigeyoshi Saito
Symmetry 2022, 14(2), 350; https://doi.org/10.3390/sym14020350
Available online: https://www.mdpi.com/2073-8994/14/2/350

3. “Symmetric versus Asymmetric Features of Homologous Homodimeric Amine Oxidases: When Water and Cavities Make the Difference”
by Eleonora Nicolai, Velia Minicozzi, Luisa Di Paola, Rosaria Medda, Francesca Pintus, Giampiero Mei and Almerinda Di Venere
Symmetry 2022, 14(3), 522; https://doi.org/10.3390/sym14030522
Available online: https://www.mdpi.com/2073-8994/14/3/522

4. “Spectrum of Primordial Gravitational Waves in Modified Gravities: A Short Overview”
by Sergei D. Odintsov, Vasilis K. Oikonomou and Ratbay Myrzakulov
Symmetry 2022, 14(4), 729; https://doi.org/10.3390/sym14040729
Available online: https://www.mdpi.com/2073-8994/14/4/729

5. “Topological Excitations in Neutral–Ionic Transition Systems”
by Keishi Sunami, Ryosuke Takehara, Kazuya Miyagawa, Hiroshi Okamoto and Kazushi Kanoda
Symmetry 2022, 14(5), 925; https://doi.org/10.3390/sym14050925
Available online: https://www.mdpi.com/2073-8994/14/5/925

6. “A Consistent Theory of Tachyons with Interesting Physics for Neutrinos”
by Charles Schwartz
Symmetry 2022, 14(6), 1172; https://doi.org/10.3390/sym14061172
Available online: https://www.mdpi.com/2073-8994/14/6/1172

7. “On Special Properties for Continuous Convex Operators and Related Linear Operators”
by Octav Olteanu
Symmetry 2022, 14(7), 1390; https://doi.org/10.3390/sym14071390
Available online: https://www.mdpi.com/2073-8994/14/7/1390

8. “C₂-Symmetric N-Heterocyclic Carbenes in Asymmetric Transition-Metal Catalysis”
by Costabile Chiara, Stefania Pragliola and Fabia Grisi
Symmetry 2022, 14(8), 1615; https://doi.org/10.3390/sym14081615
Available online: https://www.mdpi.com/2073-8994/14/8/1615

9. “Comparing Hermitian and Non-Hermitian Quantum Electrodynamics”
by Southall Jake, Daniel Hodgson, Robert Purdy and Almut Beige
Symmetry 2022, 14(9), 1816; https://doi.org/10.3390/sym14091816
Available online: https://www.mdpi.com/2073-8994/14/9/1816

10. “Discontinuous Normals in Non-Euclidean Geometries and Two-Dimensional Gravity”
by Emmanuele Battista and Giampiero Esposito
Symmetry 2022, 14(10), 1979; https://doi.org/10.3390/sym14101979
Available online: https://www.mdpi.com/2073-8994/14/10/1979

11. “The Value of the Early-Time Lieb-Robinson Correlation Function for Qubit Arrays”
by Brendan J. Mahoney and Craig S. Lent
Symmetry 2022, 14(11), 2253; https://doi.org/10.3390/sym14112253 
Available online: https://www.mdpi.com/2073-8994/14/11/2253

12. “Pt-Modified Nano-Sized Mn₂O₃ Oxide Prepared from the Mn₃O₄ Phase with Tetragonal Symmetry for CO Oxidation”
by Todorova Silviya, Anton Naydenov, Maya Shopska, Hristo Kolev, Iliyana Yordanova and Krasimir Tenchev
Symmetry 2022, 14(12), 2543; https://doi.org/10.3390/sym14122543
Available online: https://www.mdpi.com/2073-8994/14/12/2543