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CA$2.70
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The Golden key Postcard
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Paper Type
Signature Matte
18 pt thickness / 120 lb weight Soft white, soft eggshell texture
-CA$0.25
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The Golden key Postcard
Euler's product in relation to the zeta function, as Derbyshire refers to as the "golden key". Euler gave a thorough proof of this relation, which is an important aspect in the Riemann conjecture, relating to the distribution of primes. One of the most beautiful equations in all of maths.
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4.9 out of 5 stars rating16.1K Total Reviews
16,094 Reviews
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5 out of 5 stars rating
By Tina J.March 5, 2019 • Verified Purchase
Post Card, Size: Standard Postcard, Paper: Signature Matte, Envelopes: None
Zazzle Reviewer Program
nicely done very clear. print turned out well done
5 out of 5 stars rating
By Denise W.May 1, 2024 • Verified Purchase
Post Card, Size: Standard Postcard, Paper: Signature Matte, Envelopes: None
I'm in love! Just look how sweet these two are! 🥰☘🍀. Great graphics n print! Glossy adds flair! Thanks! ☘🍀
5 out of 5 stars rating
By Denise W.May 1, 2024 • Verified Purchase
Post Card, Size: Standard Postcard, Paper: Signature Matte, Envelopes: None
🐰🐇..Bundorable sweet card! Love the vintage vibe which I wanted! Not a flimsy card! Graphics are awesome n print so good!
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Product ID: 239550796619355145
Designed on 2012-12-01, 8:01 AM
Rating: G
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