French physicist (1872-1946) who developed Langevin dynamics and the Langevin equation. ALS in French, signed “P. Langevin, Professeur au College de France,” one page, 5.5 x 7, November 28, 1924. Untranslated. In fine condition.
This item is Pre-Certified by PSA/DNA
Buy a third-party letter of authenticity for
(inquire for price)
*This item has been pre-certified by a trusted third-party authentication service, and by placing a bid on this item, you agree to accept the opinion of this authentication service. If you wish to have an opinion rendered by a different authenticator of your choosing, you must do so prior to your placing of any bid. RR Auction is not responsible for differing opinions submitted 30 days after the date of the sale.
