Permutation City

unexceptionable moments between them, ruthlessly weeding out anything that seemed too optimistic, too much like wish-fulfilment. She wasn't interested in inventing a perfect life for the other Maria; she only wanted to guess the unknowable truth.

But she had to keep believing that she'd saved Francesa. Anything less would have been unbearable.

She tried to think of herself as an emigrant, an ocean-crosser in the days before aircraft, before telegraphs. People had left everything behind, and survived. Prospered. Flourished. Their lives hadn't been destroyed; they'd embraced the unknown, and been enriched, transformed.

The unknown? She was living in an artifact, a mathematical object she'd helped Durham construct for his billionaires. Elysium was a universe made to order. It contained no hidden wonders, no lost tribes.

But it did contain the Autoverse.

The longer she thought about it, the more it seemed that Planet Lambert was the key to her sanity. Even after three billion years of evolution, it was the one thing in Elysium which connected with her past life -- leading right back to the night she'd witnessed A. lamberti digesting mutose. The thread was unbroken: the seed organism, A. hydrophila, had come from that very same strain. And if the Autoverse, then, had been the ultimate indulgence, a rarefied intellectual game in a world beset with problems, the situation now was completely inverted: the Autoverse was home to hundreds of millions of lifeforms, a flourishing civilization, a culture on the verge of a scientific revolution. In a universe subject to whim, convenience and fantasy, it seemed like the only solid ground left.

And although she suffered no delusions of having personally 'created' the Lambertians -- sketching their planet's early history, and cobbling together an ancestor for them by adapting someone else's translation of a terrestrial bacterium, hardly qualified her to take credit for their multiplexed nervous systems and their open-air digestive tracts, let alone their self-awareness -- she couldn't simply wash her hands of their fate. She'd never believed that Planet Lambert could be brought into existence -- but she had helped to make it happen nonetheless.

Part of her still wanted to do nothing but rage against her awakening, and mourn her loss. Embracing the Autoverse seemed like an insult to the memory of Earth -- and a sign that she'd accepted the way Durham had treated her. But it began to seem perverse to the point of insanity to turn her back on the one thing which might give her new life some meaning -- just to spite Durham, just to make a lie of his reasons for waking her. There were other ways of making it clear that she hadn't forgiven him.

The apartment -- at first, inconceivably large, almost uninhabitable -- slowly lost its strangeness. On the tenth morning, she finally woke expecting the sight of the bedroom exactly as she found it; if not at peace with her situation, at least unsurprised to be exactly where she was.

She phoned Durham and said, 'I want to join the expedition.'

+ + +

The Contact Group occupied one story of a tower in the southeast quadrant. Maria, uninterested in teleporting, made the journey on foot, crossing from building to building by walkway, ignoring the puppets and admiring the view. It was faster than traveling at street level, and she was gradually conquering her fear of heights. Bridges here did not collapse from unanticipated vibrations. Perspex tubes did not hurtle to the ground, spilling corpses onto the pavement. It made no difference whether or not Malcolm Carter had known the first thing about structural engineering; the City was hardly going to bother laboriously modeling stresses and loads just to discover whether or not parts of itself should fail, for the sake of realism. Everything was perfectly safe, by decree.

Durham was waiting for her in the foyer. Inside, he introduced her to Dominic Repetto and Alisa Zemansky, the project's other leaders. Maria hadn't known what to expect from her first contact with later-generation Elysians, but they presented as neatly dressed humans, male and female, both 'in their late thirties,' wearing clothes which would not have looked wildly out of place in any office in twenty-first century Sydney. Out of deference to her? She hoped not -- unless the accepted thing to do, in their subculture, was to show a different form to everyone, expressly designed to put them at ease. Repetto, in fact, was so strikingly handsome that she almost recoiled at the thought that he -- or his parent -- had deliberately chosen such a face. But what did codes of vanity from the age of cosmetic surgery and gene splicing mean, now? Zemansky was stunning too, with dark-flecked violet eyes and spiked blonde hair. Durham appeared -- to her, at least -- almost unchanged from the man she'd met in 2050. Maria began to wonder how she looked to the young Elysians. Like something recently disinterred, probably.

Repetto shook her hand over and over. 'It's a great, great honor to meet you. I can't tell you how much you've inspired us all.' His face shone; he seemed to be sincere. Maria felt her cheeks flush, and tried to imagine herself in some analogous situation, shaking hands with . . . who? Max Lambert? John von Neumann? Alan Turing? Charles Babbage? Ada Lovelace? She knew she'd done nothing compared to any of those pioneers -- but she'd had seven thousand years for her reputation to be embellished. And three billion for her work to bear fruit.

The floor was divided into open-plan offices, but nobody else seemed to be about. Durham saw her peering around the partitions and said cryptically, 'There are other workers, but they come and go.'

Zemansky led the way into a small conference room. She said to Maria, 'We can move to a VR representation of Planet Lambert, if you like -- but I should warn you that it can be disorienting: being visually immersed but intangible, walking through vegetation, and so on. And moving at the kinds of speeds necessary to keep track of the Lambertians can induce motion sickness. Of course, there are neural changes which counteract both those problems --'

Maria wasn't ready to start tampering with her brain -- or to step onto the surface of an alien planet. She said, 'Viewing screens sound easier. I'd be happier with that. Do you mind?' Zemansky looked relieved.

Repetto stood at the end of the table and addressed the three of them, although Maria knew this was all for her benefit.

'So much has been happening on Lambert, lately, that we've slowed it right down compared to Standard Time so we can keep up with developments.' An elliptical map of the planet's surface appeared on the wall behind him. 'Most recently, dozens of independent teams of chemists have begun looking for a simpler, more unified model underlying the current atomic theory.' Markers appeared, scattered across the map. 'It's been three hundred years since the standard model -- thirty-two atoms with a regular pattern of masses, valencies and mutual affinities -- became widely accepted. The Lambertian equivalent of Mendeleev's Periodic Table.' He flashed a smile at Maria, as if she might have been a contemporary of Mendeleev -- or perhaps because he was proud of his arcane knowledge of the history of a science which was no longer true. 'At the time, atoms were accepted as fundamental entities: structureless, indivisible, requiring no further explanation. Over the last twenty years, that view has finally begun to break down.'

Maria was already confused. From the hurried reading she'd done in the past few days, she knew that the Lambertians only modified an established theory when a new phenomenon was discovered which the theory failed to explain. Repetto must have noticed her expression, because he paused expectantly.

She said, 'Autoverse atoms are indivisible. There are no components you can separate out, no smaller stable entities. Smash them together at any energy you like, and all they'll do is bounce -- and the Lambertians are in no position to smash them together at any energy at all. So . . . surely there's nothing in their experience that the current theory can't account for perfectly.'

'Nothing in their immediate environment, certainly. But the problem is cosmology. They've been refining the models of the history of their star system, and now they're looking for an explanation for the composition of the primordial cloud.'

'They accepted the thirty-two atoms and their properties as given -- but they can't bring themselves to do the same with the arbitrary amounts of each one in the cloud?'

'That's right. It's difficult to translate the motivation exactly, but they have a very precise aesthetic which dictates what they'll accept as a theory -- and it's almost physically impossible for them to contradict it. If they try to dance a theory which fails to resonate with the neural system which assesses its simplicity, the dance falls apart.' He thought for a second, then pointed to the screen behind him; a swarm of Lambertians appeared. 'Here's an example -- going back awhile. This is a team of astronomers -- all fully aware of the motions of the