Грег Иган - Dark Integers

An IM window popped up with Alison’s face. She looked ragged. “What time is it there?” I asked.

“Early. Laura’s got colic.”

“Ah. Are you okay to talk?”

“Yeah, she’s asleep now.”

My email had been brief, so I filled her in on the details. She pondered the matter in silence for a while, yawning unashamedly.

“The only thing I can think of is some gossip I heard at a conference in Rome a couple of months ago. It was a fourth-hand story about some guy in New Zealand who thinks he’s found a way to test fundamental laws of physics by doing computations in number theory.”

“Just random crackpot stuff, or… what?”

Alison massaged her temples, as if trying to get more blood flowing to her brain. “I don’t know, what I heard was too vague to make a judgment. I gather he hasn’t tried to publish this anywhere, or even mentioned it in blogs. I guess he just confided in a few people directly, one of whom must have found it too amusing for them to keep their mouth shut.”

“Have you got a name?”

She went off camera and rummaged for a while. “Tim Campbell,” she announced. Her notes came through on the data channel. “He’s done respectable work in combinatorics, algorithmic complexity, optimization. I scoured the net, and there was no mention of this weird stuff. I was meaning to email him, but I never got around to it.”

I could understand why; that would have been about the time Laura was born. I said, “I’m glad you still go to so many conferences in the flesh. It’s easier in Europe, everything’s so close.”

“Ha! Don’t count on it continuing, Bruno. You might have to put your fat arse on a plane sometime yourself.”

“What about Yuen?”

Alison frowned. “Didn’t I tell you? He’s been in hospital for a couple of days. Pneumonia. I spoke to his daughter, he’s not in great shape.”

“I’m sorry.” Alison was much closer to him than I was; he’d been her doctoral supervisor, so she’d known him long before the events that had bound the three of us together.

Yuen was almost eighty. That wasn’t yet ancient for a middle-class Chinese man who could afford good medical care, but he would not be around forever.

I said, “Are we crazy, trying to do this ourselves?” She knew what I meant: liaising with Sam, managing the border, trying to keep the two worlds talking but the two sides separate, safe and intact.

Alison replied, “Which government would you trust not to screw this up? Not to try to exploit it?”

“None. But what’s the alternative? You pass the job on to Laura? Kate’s not interested in having kids. So do I pick some young mathematician at random to anoint as my successor?”

“Not at random, I’d hope.”

“You want me to advertise? ‘Must be proficient in number theory, familiar with Machiavelli, and own the complete boxed set of The West Wing ?’”

She shrugged. “When the time comes, find someone competent you can trust. It’s a balance: the fewer people who know, the better, so long as there are always enough of us that the knowledge doesn’t risk getting lost completely.”

“And this goes on generation after generation? Like some secret society? The Knights of the Arithmetic Inconsistency?”

“I’ll work on the crest.”

We needed a better plan, but this wasn’t the time to argue about it. I said, “I’ll contact this guy Campbell and let you know how it goes.”

“Okay. Good luck.” Her eyelids were starting to droop.

“Take care of yourself.”

Alison managed an exhausted smile. “Are you saying that because you give a damn, or because you don’t want to end up guarding the Grail all by yourself ?”

“Both, of course.”

“I have to fly to Wellington tomorrow.”

Kate put down the pasta-laden fork she’d raised halfway to her lips and gave me a puzzled frown. “That’s short notice.”

“Yeah, it’s a pain. It’s for the Bank of New Zealand. I have to do something on-site with a secure machine, one they won’t let anyone access over the net.”

Her frown deepened. “When will you be back?”

“I’m not sure. It might not be until Monday. I can probably do most of the work tomorrow, but there are certain things they restrict to the weekends, when the branches are off-line. I don’t know if it will come to that.”

I hated lying to her, but I’d grown accustomed to it. When we’d met, just a year after Shanghai, I could still feel the scar on my arm where one of Industrial Algebra’s hired thugs had tried to carve a data cache out of my body. At some point, as our relationship deepened, I’d made up my mind that however close we became, however much I trusted her, it would be safer for Kate if she never knew anything about the defect.

“They can’t hire someone local?” she suggested. I didn’t think she was suspicious, but she was definitely annoyed. She worked long hours at the hospital, and she only had every second weekend off; this would be one of them. We’d made no specific plans, but it was part of our routine to spend this time together.

I said, “I’m sure they could, but it’d be hard to find someone at short notice. And I can’t tell them to shove it, or I’ll lose the whole contract. It’s one weekend, it’s not the end of the world.”

“No, it’s not the end of the world.” She finally lifted her fork again.

“Is the sauce okay?”

“It’s delicious, Bruno.” Her tone made it clear that no amount of culinary effort would have been enough to compensate, so I might as well not have bothered.

I watched her eat with a strange knot growing in my stomach. Was this how spies felt, when they lied to their families about their work? But my own secret sounded more like something from a psychiatric ward. I was entrusted with the smooth operation of a treaty that I, and two friends, had struck with an invisible ghost world that coexisted with our own. The ghost world was far from hostile, but the treaty was the most important in human history, because either side had the power to annihilate the other so thoroughly that it would make a nuclear holocaust seem like a pinprick.

Victoria University was in a hilltop suburb overlooking Wellington. I caught a cable car, and arrived just in time for the Friday afternoon seminar. Contriving an invitation to deliver a paper here myself would have been difficult, but wangling permission to sit in as part of the audience was easy; although I hadn’t been an academic for almost twenty years, my ancient Ph.D and a trickle of publications, however tenuously related to the topic of the seminar, were still enough to make me welcome.

I’d taken a gamble that Campbell would attend—the topic was peripheral to his own research, official or otherwise—so I was relieved to spot him in the audience, recognizing him from a photo on the faculty web site. I’d emailed him straight after I’d spoken to Alison, but his reply had been a polite brush-off: he acknowledged that the work I’d heard about on the grapevine owed something to the infamous search that Alison and I had launched, but he wasn’t ready to make his own approach public.

I sat through an hour on “Monoids and Control Theory,” trying to pay enough attention that I wouldn’t make a fool of myself if the seminar organizer quizzed me later on why I’d been sufficiently attracted to the topic to interrupt my “sightseeing holiday” in order to attend. When the seminar ended, the audience split into two streams: one heading out of the building, the other moving into an adjoining room where refreshments were on offer. I saw Campbell making for the open air, and it was all I could do to contrive to get close enough to call out to him without making a spectacle.