Abstract: As is already known from the work of D. Janin & I. Walukiewicz (1996), the mu-calculus is as expressive as the bisimulation-invariant fragment of monadic second-order logic. In this paper, ...

When a major cybersecurity firm discovers evidence pointing to a nation-state, the decision to publicly name that country can be ...

Buy used 2019 Maruti Ignis 1.2 Sigma BSIV with 35,900 km in Ghatkopar West, Mumbai starting from ₹3.24 Lakh. Listed by corporate fleet partners, easy financing & multi-point inspection on CarDekho.

Order does not affect plans to restart production, firm says Bank of America downgraded Sigma shares, causing 15% drop Sigma still fighting former co-CEO in court over mining rights RIO DE JANEIRO, ...

Brazil’s Labor Ministry has shut down three waste piles at Sigma Lithium’s flagship mine in the state of Minas Gerais, citing a “grave and imminent” risk to workers and the local community, according ...

Hyderabad: Marking its foray into precision engineering and manufacturing, Hyderabad-based Sigma Advanced Systems acquired a 100% stake in UK-based Nasmyth Group, a tier-1 precision engineering ...

The teaser of Sundeep Kishan starrer, Sigma, which marks the directorial debut of superstar Vijay’s son, Jason Sanjay, was unveiled by the makers on Tuesday, December 23, 2025. With music by Thaman S, ...

Recent reports of tighter lithium supply from China have pushed prices higher, with Sigma Lithium responding by adjusting sales volumes to benefit from the stronger pricing environment and support ...

It is pointed out that the effective continuum action for σ-models and Yang-Mills theories may differ from the naive continuum action by terms of order g2 or higher, which are nonsymmetric. The ...

Two Sigma Investments launched a hedge fund that jumps on one of the hottest trends in wealth management: minimizing taxes. The quantitative firm debuted Two Sigma Beacon Fund this year, a so-called ...

Delta-sigma (ΔΣ) converters may sound complex, but at their core, they are all about precision. In this post, we will peel back the layers and uncover the fundamentals behind their elegant design. At ...

Sigma Performance Services Racing, which has run a part-time ARCA Menards Series program over the last couple of seasons, is leaping to go full-time NASCAR O'Reilly Auto Parts Series racing in 2026.