“Jesus,” says Harold, who has just turned sixty-five. “There’s a cheery thought. Go put your stuff in your room and come into the kitchen. Julia’s tied up in a meeting but she’ll be home in an hour or so.”
He drops his bag in the guest room—“Jude’s room,” Harold and Julia call it; “your room”—and changes out of his suit and heads toward the kitchen, where Harold is peering into a pot on the stove, as if down a well. “I’m trying to make a bolognese,” he says, without turning around, “but something’s happening; it keeps separating, see?”
He looks. “How much olive oil did you use?”
“A lot.”
“What’s a lot?”
“A lot. Too much, obviously.”
He smiles. “I’ll fix it.”
“Thank god,” says Harold, stepping away from the stove. “I was hoping you’d say that.”
Over dinner, they speak of Julia’s favorite researcher, who she thinks might be trying to jump to another lab, and of the latest gossip circulating through the law school, and of the anthology of essays about Brown versus Board of Education that Harold is editing, and of one of Laurence’s twin daughters, who is getting married, and then Harold says, grinning, “So, Jude, the big birthday’s coming up.”
“Three months away!” Julia chirps, and he groans. “What are you going to do?”
“Probably nothing,” he says. He hasn’t planned anything, and he has forbidden Willem from planning anything, either. Two years ago, he threw Willem a big party for his fortieth at Greene Street, and although the four of them had always said they’d go somewhere for each of their fortieth birthdays, it hasn’t worked out that way. Willem had been in L.A. filming on his actual birthday, but after he had finished, they’d gone to Botswana on a safari. But it had been just the two of them: Malcolm had been working on a project in Beijing, and JB—well, Willem hadn’t mentioned inviting JB, and he hadn’t, either.
“You have to do something,” says Harold. “We could have a dinner for you here, or in the city.”
He smiles but shakes his head. “Forty’s forty,” he says. “It’s just another year.” As a child, though, he never thought he’d make it to forty: in the months after the injury, he would sometimes have dreams of himself as an adult, and although the dreams were very vague—he was never quite certain where he was living or what he was doing, though in those dreams he was usually walking, sometimes running—he was always young in them; his imagination refused to let him advance into middle age.
To change the subject, he tells them about Dr. Kashen’s funeral, where Dr. Li gave a eulogy. “People who don’t love math always accuse mathematicians of trying to make math complicated,” Dr. Li had said. “But anyone who does love math knows it’s really the opposite: math rewards simplicity, and mathematicians value it above all else. So it’s no surprise that Walter’s favorite axiom was also the most simple in the realm of mathematics: the axiom of the empty set.
“The axiom of the empty set is the axiom of zero. It states that there must be a concept of nothingness, that there must be the concept of zero: zero value, zero items. Math assumes there’s a concept of nothingness, but is it proven? No. But it must exist.
“And if we are being philosophical—which we today are—we can say that life itself is the axiom of the empty set. It begins in zero and ends in zero. We know that both states exist, but we will not be conscious of either experience: they are states that are necessary parts of life, even as they cannot be experienced as life. We assume the concept of nothingness, but we cannot prove it. But it must exist. So I prefer to think that Walter has not died but has instead proven for himself the axiom of the empty set, that he has proven the concept of zero. I know nothing else would have made him happier. An elegant mind wants elegant endings, and Walter had the most elegant mind. So I wish him goodbye; I wish him the answer to the axiom he so loved.”
They are all quiet for a while, contemplating this. “Please tell me that isn’t your favorite axiom,” Harold says suddenly, and he laughs. “No,” he says. “It’s not.”
He sleeps in the next day, and that night he goes to the wedding, where because both of the grooms lived in Hood, he knows almost everyone. The non-Hood guests—Lionel’s colleagues from Wellesley, and Sinclair’s from Harvard, where he teaches European history—stand near one another as if for protection, looking bored and bemused. The wedding is loose-limbed and slightly chaotic—Lionel starts assigning his guests tasks as soon as they arrive, which most of them neglect: he is supposed to be making sure everyone signs the guest book; Willem is supposed to be helping people find their tables—and people walk around saying how, thanks to Lionel and Sinclair, thanks to this wedding, they won’t have to go to their twentieth reunion this year. They are all here: Willem and his girlfriend, Robin; Malcolm and Sophie; and JB and his new boyfriend, whom he hasn’t met, and he knows, even before checking their place cards, that they will all be assigned to the same table. “Jude!” people he hasn’t seen in years say to him. “How are you? Where’s JB? I just spoke to Willem! I just saw Malcolm!” And then, “Are you four all still as close as you were?”