Only their matrices. It’s not difficult to produce alternatives. The concept isn’t patentable.
Source date (UTC): 2023-09-05 05:07:39 UTC
Original post: https://twitter.com/i/web/status/1698925842175287532
Reply addressees: @ShannonsDemon @ScienceMonthly
Replying to: https://twitter.com/i/web/status/1698925363361968160
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