A photograph of a chalkboard with various drawings and handwritten notes, likely related to scientific or mathematical concepts. The chalkboard includes caricatures of two faces, a stylized female figure, and various diagrams. Handwritten text includes equations, labels for diagrams, and possibly conceptual notes with words like 'payment layer', 'transaction layer', 'fraction', and mathematical notation like 'H(s,c)'. The setting suggests an academic or historical environment with decorative pillars and sculptures or busts on a shelf.
documents/vol00010-efta01303410-pdf.pdf
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