1555 – 1561
Saint Basil’s Cathedral, commonly known as The Cathedral of Vasily the Blessed, in Moscow, Russia, was built by Ivan the Terrible from 1555-1561 and commemorates the capture of Kazan and Astrakhan. The building, now a museum, is officially known as the Cathedral of the Intercession of the Most Holy Theotokos on the Moat. I visited Moscow in November 2004. I saw Lenin’s body in the Mausoleum. It was beautiful city.
Howard Garns (1905 – 1989)
- Sudoku was invented by Howard Garns, a 74 year old retired architect and freelance puzzle creator, and first published in 1979 by Dell Magazines as Number Place (the earliest known examples of modern Sudoku).
- The name “sudoku” is abbreviated from the Japanese suuji wa dokushin ni kagiru, which means “the numbers (or digits) must remain single.” Now there are sudoku competitions across the globe, and variations of the puzzle often appear side-by-side the crossword puzzle in newspapers and magazines.
Mathematics Symbols and their Meanings
Natural – Whole – Integers – Rational – Irrational
Algebra – Arithmetic – Applied Mathematics – Geometry – Trigonometry
Aryabhatta (476 – 551 AD)