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Computer scientists at the University of Pennsylvania have proved that pricing algorithms can drive up prices even when they lack the capacity to collude. Aaron Roth and four colleagues studied so-called no-swap-regret algorithms, which are designed to minimize losses and were previously thought to guarantee competitive pricing. The researchers found that when such an algorithm faces an opponent using a nonresponsive strategy -- one that randomly selects from predetermined price probabilities without reacting to competitor moves -- both players can end up in equilibrium at high prices. Neither has an incentive to switch strategies because their profits are nearly equal and as high as possible under the circumstances. The nonresponsive strategy cannot express threats because it does not respond to opponent behavior, yet it effectively coaxes the learning algorithm into raising prices. Mallesh Pai, an economist at Rice University not involved in the research, said the finding matters because regulators have no clear grounds to intervene without evidence of threats or agreements. Roth conceded however that he lacks a solution to the regulatory challenge his team identified.

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Nvidia became the world's first $5 trillion company on Wednesday after its stock climbed 5% in early Wall Street trading to push its market capitalization to $5.13 trillion. The Silicon Valley chipmaker reached the milestone three months after hitting $4 trillion and three years after it was valued at roughly $400 billion before the debut of ChatGPT. Nvidia chief executive Jensen Huang said Tuesday that Nvidia had secured half a trillion dollars in orders for its AI chips over the next five quarters. The stock had already gained 5% on Tuesday and added more than $200 billion to its market value. President Donald Trump said Wednesday he planned to discuss Nvidia's Blackwell chip with China's President Xi Jinping when the two leaders meet later this week. Nvidia's latest generation of graphics processing units is not currently available in China because of US export controls. The company's shares have risen more than 85% in the past six months.

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Bill Gates is retreating from his earlier warnings about climate change. The Microsoft co-founder now argues that what he called the "doomsday view of climate change" has caused the climate community to focus too heavily on near-term emissions goals and divert resources from addressing poverty and disease in the world's poorest countries. In a blog post, Gates wrote that climate change will have serious consequences but will not lead to humanity's demise. He acknowledges that some climate advocates will call him a hypocrite given his own carbon footprint and his 2021 book warning that climate change could be as deadly as COVID-19 by mid-century and five times as deadly by 2100. The poorest countries receive less than 1% of rich countries' budgets at their highest level and that this share is shrinking as wealthy nations cut aid and low-income countries struggle with debt, he wrote. Rising temperatures are now inevitable and that the current consensus suggests Earth's average temperature will be between two and three degrees Celsius higher than 1850 levels by 2100.

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An anonymous reader quotes a report from Politico: Sen. Tom Cotton wasn't fast enough in 2022 to block Senate passage of legislation that would make daylight saving time permanent. Three years later, he wasn't about to repeat that same mistake. The Arkansas Republican was on hand Tuesday afternoon to thwart a bipartisan effort on the chamber floor to pass a bill that would put an end to changing the clocks twice a year, including this coming Sunday. [...] A cross-party coalition of lawmakers has been trying for years to make daylight saving time the default, which would result in more daylight in the evening hours with less in the morning, plus bring to a halt to biannual clock adjustments. President Donald Trump endorsed the concept this spring, calling the changing of the clocks "a big inconvenience and, for our government, A VERY COSTLY EVENT!!!" His comments coincided with a hearing, then a markup, of Scott's legislation in the Senate Commerce Committee. It set off an intense lobbying battle in turn, pitting the golf and retail industries -- which are advocating for permanent daylight saving time -- against the likes of sleep doctors and Christian radio broadcasters -- who prefer standard time. "If permanent Daylight Savings Time becomes the law of the land, it will again make winter a dark and dismal time for millions of Americans," said Cotton in his objection to a request by Sen. Rick Scott (R-Fla.) to advance the bill by unanimous consent. "For many Arkansans, permanent daylight savings time would mean the sun wouldn't rise until after 8:00 or even 8:30am during the dead of winter," Cotton continued. "The darkness of permanent savings time would be especially harmful for school children and working Americans."

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Longtime Slashdot reader zuki writes: According to a recent report over at Tom's Hardware, a number of those among early buyers who have been able to put the highly-coveted $4,000.00 DGX Spark mini-AI workstation through its paces are reporting throttling at 100W (rather than the advertised 240W capacity), spontaneous reboots, and thermal issues under sustained load. The workstation came under fire after John Carmack, the former CTO of Oculus VR, began raising questions about its real-world performance and power draw. "His comments were enough to draw tech support from Framework and even AMD, with the offer of an AMD-driven Strix Halo-powered alternative," reports Tom's Hardware. "What's causing this suboptimal performance, such as a firmware-level cap or thermal throttling, is not clear," the report adds. "Nvidia hasn't commented publicly on Carmack's post or user-reported instability. Meanwhile, several threads on Nvidia's developer forums now include reports of GPU crashes and unexpected shutdowns under sustained load."

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