John D. Cook
@johndcook.bsky.social
Mathematician, data privacy consultant See also @johndcook.mathstodon.xyz.ap.brid.gy
Does DeepSeek demonstrate that we don’t need as much compute power as we thought? www.johndcook.com/blog/2025/02...
New podcast interview just dropped. Protecting Privacy in the Age of AI: A Conversation with John Cook www.trenegy.com/podcast/prot...
Protecting Privacy in the Age of AI: A Conversation with John Cook
We discuss safeguarding sensitive information in data-intensive industries, the balance of preserving data utility and protecting privacy as AI applications raise new concerns, and methods like differ...
trenegy.com
How the day of the week for New Years Day goes through a 28 year cycle. The green diamonds represent leap years and the blue squares represent ordinary years.
Centered triangular numbers are the number of dots in images such as the one below. The nth centered triangular number equals 1 + 3n(n + 1)/2.
By the nth day of Christmas, my true love had sent to me n(n+1)(n+2)/6 gifts. www.johndcook.com/blog/2009/12...
Twelve Days of Christmas and tetrahedral numbers
How many gifts are there in the song Twelve Days of Christmas? Day 1: 1 gift Day 2: 1 + 2 = 3 gifts Day 3: 1 + 2 + 3 = 6 gifts … Day 12: 1 + 2 + 3 + … + 12 = 78 gifts The number of gifts on day
johndcook.com
If you press the cosine key on a calculator over and over, you always get stuck on the same number. This post takes a more sophisticated look at a child’s amusement. www.johndcook.com/blog/2024/12...
A golden hospital gown is an allusion to The Emperor’s New Clothes, except the emperor is somewhere between sumptuously clothed and naked. www.johndcook.com/blog/2024/12...
How many ways can you select six points in the plane so that every subset of three points forms the vertices of an isosceles triangle? www.johndcook.com/blog/2024/12...
My Mastodon posts are automatically posted to the Bluesky account @johndcook.mathstodon.xyz.ap.brid.gy
