THE BAIS HAVAAD THE DAF IN HALACHA ERUVIN DAF 82 WHICH CIRCUMSTANCES REQUIRE AN ERUV

RAV GREENWALD SAYS A DIVAR MITZVA IOS PARTICIPATING IN A MITZVA.A SPORTS GAME IS NOT SIMCHAS YOM TOV.A MEDICAL NEED OR BEING A MASHGIACH KASHRUS IS A DIVAR MITZVA.A BEN TORAH MAKING PARNASAH IS A DIVAR MITZVA AND TO KEEP A MINYAN GOING IS A DIVAR MITZVA.