Whitney’s voice cuts him off. She still has not turned around. You’re using my time. The room is now openly tense. Phones up everywhere. A young undergrad in the back has started crying. Not from sadness, from something she doesn’t have words for yet. Audrey Whitfield is still recording. Her free hand is gripping the edge of her seat. The stopwatch reads 0:32. Whitney spots the symmetry. The symmetry. The one Ashford never saw in 9 years. She draws a small triangle in the corner of the board to flag it. Three more people stand up. Henrik Sandberg writes one line in his notebook in his shakiest handwriting. The line reads, “I’m watching a paper get written in real time.” In the audience, an elderly mathematician in the third row, emeritus, retired 10 years ago, came to the colloquium today only because his wife dragged him out, has taken off his hearing aid. He is not turning it off. He is taking it out so he can hold his head in both hands and not be distracted by anything but what is on the board. A young woman two rows behind him has pulled out a small notebook and is copying Whitney’s work down line by line. She will keep this notebook for the rest of her life.
In 9 years, she will publish a paper that builds on this proof. And in the acknowledgements, she will write, “To the woman who taught me what mathematics looks like when nobody has permission to silence it. The live stream comment counter clicks past 25,000. The Harvard math department’s YouTube channel has, in the last 6 minutes, gained more new subscribers than it has gained in the previous 6 years. The stopwatch reads 0:20. In Brookline, Teddy is on the floor of his dorm room. He has called their grandmother in Atlanta. He’s holding the phone up to his laptop screen so she can hear and see. Their grandmother is whispering over and over. Lord. Lord. Lord.
The stopwatch reads 0:14. Whitney lifts her marker for the next-to-last line, and she stops. She lowers the marker. She turns around. The whole room sees her face. It is calm. It is not afraid. But it is angry now. For the first time in this lecture, there is genuine anger in it. She turns to Ashford. You changed the problem. The room rustles. Confused murmurs. Ashford’s face goes blank for half a second. I I don’t know what you mean, Ms. Brooks. The slide is the slide. We’ve been looking at it for Whitney walks past him. She walks to the side of the stage where the projector laptop sits open on a podium. She does not touch it. Henrik, she says. Henrik Sandburg looks up like a man called by name in a courtroom. Pull up the version of this integral from his 2018 paper. The published version. The one in the public record. Henrik freezes. Henrik, Eleanor Vance says from the panel. Her voice is very quiet. Pull it up. Henrik types, hands shaking. The 2018 version of the Ashford boundary appears on the screen, side by side with the version Ashford has been lecturing on this morning. They are not the same equation. A constraint has been added to the version on stage, a small one.
