Pyotr Ilyich Tchaikovsky 1840 – 1893 was a Russian composer of the Romantic period. He was the first Russian composer whose music made a lasting impression internationally, which was bolstered by his appearances as a guest conductor in Europe and the United States. He was honoured in 1884 by Tsar Alexander III and awarded a […]

Pathfinder’s Office Hours at the Science Circle   Are you interested in immersive learning, art and education in virtual worlds? Want to join an engaging discussion with a roundtable of friendly people? If so, please join us at my weekly Office Hour at the Science Circle in Second Life. Hope to see you there!

Solar Sierra and Windy Schor represent EnergyTeachers.org in Second Life, building virtual objects for exploring real-life technologies, and holding meetings and discussions between educators and interested people. Windy uses the […]

The Cantor Bernstein Schröder Theorem of Set Theory   The EQUIVALENCE THEOREM (a.k.a. Bernstein-Schröder Theorem) Modern set theory originated between 1874 – 1884 from the researches of Georg Cantor at […]