1. Editorial

   • Susanta Mahapatra

   Departments 29 June 2021 Pages: 725 - 727

2. Science Smiles

   • Ayan Guha

   Departments 29 June 2021 Pages: 730 - 730

3. Clemens C. J. Roothaan: FC = SCε

   • Susanta Mahapatra

   Departments 29 June 2021 Pages: 731 - 736

4. Life and Science of Clemens C. J. Roothaan

   • Shridhar R. Gadre
   • Subhas J. Chakravorty

   General Article 29 June 2021 Pages: 737 - 755

5. Airy Functions Demystified — II

   • M. S. Ramkarthik
   • Elizabeth Louis Pereira

   General Article 29 June 2021 Pages: 757 - 789

6. Quantum Game Theory — II

   • Indranil Ghosh

   General Article 29 June 2021 Pages: 791 - 812

7. Teaching Irrational Numbers Through Trigonometry

   • Sameen Ahmed Khan

   General Article 29 June 2021 Pages: 813 - 827

8. Beauties Beneath

   • Uttam Saikia
   • Manuel Ruedi

   General Article 29 June 2021 Pages: 829 - 840

9. Mathematics of Securing a Box With a Single Rubber Band

   • P. Jayanth Vyasanakere
   • Rajaram Nityananda

   Classroom 29 June 2021 Pages: 841 - 850

10. Graceful Labelings of Caterpillar Trees: A Proof Without Words

    • Venkata Karthik Bandaru

    Classroom 29 June 2021 Pages: 851 - 852

11. Error Propagation

    • Arvind Singh
    • Priyanka Chaturvedi

    Classroom 29 June 2021 Pages: 853 - 861

12. Night Life

    Departments 29 June 2021 Pages: 863 - 863