Send the following on WhatsApp
Continue to ChatRepresenting Ordinal Numbers with Arithmetically Interesting Sets of Real Numbers https://jdh.hamkins.org/representing-ordinal-numbers-with-arithmetically-interesting-sets-of-real-numbers/
Representing Ordinal Numbers with Arithmetically Interesting Sets of Real Numbers https://jdh.hamkins.org/representing-ordinal-numbers-with-arithmetically-interesting-sets-of-real-numbers/