[General] Williamson's "A new linear theory of light and matter"

[Richard Gauthier]

Hello all, 
The coming APS Annual April Meeting will be free and online (the physical meeting had to be cancelled). The meeting is FREE to all, but registration is required. The link is below.
     all the best,
          Richard

https://april.aps.org/
Registration is Now Open for the APS Virtual April Meeting

Registration is now open for the APS Virtual April Meeting, which will be held online April 18–21, 2020. Attendance is free of charge and open to both APS members and non-members, but registration is required to attend. If you previously registered for the 2020 April Meeting you will need to register again.
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