Author of Shemirat Shabbat Kehilkhatah Passed Away
Rabbi Yehoshua Neuwirth z”l, the author of the well-known book on the laws of Shabbat, Shemirat Shabbat Ke-Hilkhatah, has passed away in Jerusalem. His book has been one of the most influential halakhic works published in the past few decades and I am lucky enough to have all three editions, enabling me to see what changes have been made over the years. One of the most well known changes between the first and second editions was the more restrictive ruling in the second edition about using a solar water heater (דוד שמש) on Shabbat. Here, here, and here are discussions (in Hebrew) of some of the differences between the second and third editions. יהי זכרו ברוך.