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Max Planck Autograph Letter Signed on a Differential Equation (October 5, 1897)

Currency:USD Category:Collectibles / Autographs Start Price:NA Estimated At:1,000.00 - 1,500.00 USD
Max Planck Autograph Letter Signed on a Differential Equation (October 5, 1897)

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Auction Date:2021 May 20 @ 18:00 (UTC-05:00 : EST/CDT)
Location:15th Floor WeWork, Boston, Massachusetts, 02108, United States
ALS - Autograph Letter Signed
ANS - Autograph Note Signed
AQS - Autograph Quotation Signed
AMQS - Autograph Musical Quotation Signed
DS - Document Signed
FDC - First Day Cover
Inscribed - “Personalized”
ISP - Inscribed Signed Photograph
LS - Letter Signed
SP - Signed Photograph
TLS - Typed Letter Signed
ALS in German, signed “M. Planck,” one page both sides, 5.5 x 8.75, October 5, 1897. Handwritten mathematical letter to Dr. Ludwik Silberstein, discussing the full solution (the "general integral") of a particular differential equation. Well known for his mathematical prowess, Planck obtains the solution, both in general, and in a particular “limiting case” of interest to Silberstein. He adds a postscript (translated): "The proceedings of the Physical Society in Berlin are sent free of charge only to dues-paying members." In very good to fine condition, with a partial split to the central horizontal fold, a few tiny edge tears, and a diagonal crease to one corner.