最終更新日:2022/12/24

{{quote-text|en|year=2001|author=Stephanie Frank Singer|title=Symmetry in Mechanics: A Gentle, Modern Introduction|page=33|url=http://books.google.com/books?id=MU0fp7nPRB0C&pg=PA33&dq=%22handwave%22&hl=en&ei=35jrTd6VEoruvQPD5_juDw&sa=X&oi=book_result&ct=result&resnum=6&ved=0CEMQ6AEwBTge#v=onepage&q=%22handwave%22&f=false|passage=Some readers may wish to handwave this restriction away, thinking of tfrac ∂∂𝜌 as a differentiable vector field on ℝ² that behaves badly at the origin; this approach will suffice for the purposes of this book.}}

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