” lieder and art song.”
and she founded “Liederstube”
So that’s clues for investigation.
Yandex has a fantastic image search. From it, I found that image with the music shows up on these sites among others.:
So it’s likely ONE of those sites might have the name of the piece.
tedxlondon (dot) com wp-content uploads 2018 06 image1-2 (dot) jpg
iwantherjob (dot) com wp-content uploads 2017 07 Eugenia-Cheng-I-Want-Her-Job (dot) jpg
www (dot) ams (dot) org images md-201503-cheng-large (dot) jpg
www (dot) saic (dot) edu sites default files Cheng (dot) jpg
ichef-1 (dot) bbci (dot) co (dot) uk news 624 cpsprodpb 881D production _97254843_aaa (dot) jpg
www (dot) ams (dot) org images md-201503-cheng (dot) jpg
coolgirl (dot) sockittome (dot) com wp-content uploads 2015 08 eugenia-illuminated-resize (dot) jpg
webresources (dot) mq (dot) edu (dot) au about events wp-content uploads 2017 08 EugeniaMusic-Web-215×108 (dot) jpg
I’m assuming she gives similar talks with similar examples. I got fooled by the color dress (I think it must be a favorite of hers).
at 15m she uses Bach to show how it sparked her interest in braid theory (I think).
Looks like the last two rows on the left page matches the music projecting across her in the original image. I’m satisfied now.