Conclusion גמרא דף לח: “פינה ממיחם למיחם until the Mishna
Practical cases
The one transfer the contents of a Crock-Pot into a second pot and return the second pot to the fire?
May one add hot water directly from a hot water urn into a crock pot?
Is it permitted if the water is placed into a cup and then poured into the Crock-Pot?
What is the halachik conclusion of פינה ממיחם למיחם
Learn מגן אברהם ס’ רנ”ג ס”ק כ
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And ה’ רע”א אות ז
Learn משנה ברורה ס’ רנ”ג ס”ק נה
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And שער הציון אות מז
According to the Ran If one transfered the contents of a pot to a second pot can the second pot be returned to the stovetop?
According to Tosfos
With the return of the second part be permitted if the second pot is hot?