Hjelmslev's theorem
plural of Podell
A glass vessel containing coloured liquid, formerly (from the 17th century) displayed outside pharmacies.
(geometry) a theorem stating that if a set of points P_i lying on a line is isometrically mapped to points P_i' on a different line, then the midpoints of the segments P_iP_i' also lie on a line.
plural of asphaltane
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DiQt（ディクト）
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