Commentary for Eruvin 152:6

פחות מד' על ד' וכו': אמר רב נחמן לא שנו אלא חלון שבין ב' חצירות אבל חלון שבין ב' בתים אפילו למעלה מעשרה נמי אם רצו לערב מערבין אחד מ"ט ביתא כמאן דמלי דמי

- R'Johanan holds the same view as the judges of Caesarea or, as others say, as that of the Rabbis of Caesarea who maintain [that the area of] a circle that is inscribed within a square Is [le than the latter by] a quarter<span class="x" onmousemove="('comment',' Of that square.');">¹⁴</span> [while that of] the square that is inscribed within that circle<span class="x" onmousemove="('comment',' That was inscribed in the other square.');">¹⁵</span> [is less than the outer square by] a half.<span class="x" onmousemove="('comment',' Cf. Rashi, Tosaf., R. Han. and Rashal one or other of whom the interpretation here partly follows. While the rule laid down in Caesarea seems to bear on the area of the circle and the squares, R. Johanan applied it also to the circumference of the circle and thus required a much bigger circumference than is actually necessary for an inscribed square of four handbreadths by four.');">¹⁶</span>

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