Sandro Vitenti

Physics, Cosmology; Primordial Universe; Quantum Cosmology; Quantum Field Theory in Curved Spacetimes; Numerical and Observational Cosmology; Data analysis.

[Niko @NikoSarcevic]

Fresh on @arxiv 🥳🥳🥳🥳

Blinding in cosmology is especially challenging: unlike particle physics, our signal is statistical, subtle, and extracted through a long inference chain.

Excited to share the official LSST DESC tool for blind analyses:

https://t.co/1sgyPziztD

[Sandro Vitenti @SandroVitenti]

@TheOmniLiberal "God says" doesn’t settle moral questions. When people attribute commands to God, the issue becomes which conception of God is coherent. That means looking at the whole body of moral judgments attributed to that god and asking whether they form a consistent moral pattern.

[Sandro Vitenti @SandroVitenti]

@WKCosmo @CharlesGrunfeld There's actually more to say about this. If anyone's interested, we discuss it in detail here: https://t.co/TGcgsQEJPW

[Sandro Vitenti @SandroVitenti]

@martinmbauer That's a bad vacuum definition...

[Sandro Vitenti @SandroVitenti]

I'm writing a random walk support for our APES MCMC algorithm https://t.co/4ukduL9C7c and that's ChatGPT's suggestion for illustrating it...

[Sandro Vitenti @SandroVitenti]

@bcubeddd On a related note, I find it very telling when people use terms like 'physicists' or 'mathematicians' as if these groups were homogeneous blobs. In my experience, they’re so diverse that such labels are nearly meaningless, though, alas, they do make for good clickbait.

[LIneA @LIneA_org]

Luigi Silva, cientista de dados do LIneA, representará o laboratório no Rubin Community Workshop e no LINCC Hackathon. A participação é apoiada pelo LSST-DA, ampliando o acesso de jovens pesquisadores do BPG-LSST a eventos internacionais!

Leia em: https://t.co/UUEXdTzOrK

[Sandro Vitenti @SandroVitenti]

@realism_fan Even if they explain the mean temperature and its isotropy (which they don’t, at least not in that paper), there’s still a long way to go. Claiming “1.4% up to the *full*” only highlights how unconstrained their predictions really are.

https://t.co/mf4ChYMyIz

[Sandro Vitenti @SandroVitenti]

@skdh Unfortunately, this is another example of the drama-driven science communication (DDSC?) so popular today. New data arrive, models evolve. In this case, there's still a long way to go: they need to explain isotropy and match perturbations as precisely as current models.

[Sandro Vitenti @SandroVitenti]

@skdh Unfortunately, this is another example of the drama-driven science communication (DDSC?) so popular today. New data arrive, models evolve. In this case, there's still a long way to go: they need to explain isotropy and match perturbations as precisely as current models.

[Sandro Vitenti @SandroVitenti]

@dudelbem @ODevLibertario Não é só que lucram com sensacionalismo, elas otimizam algoritmos para prender atenção a qualquer custo, mesmo que isso envolva desinformação, discurso de ódio ou teorias conspiratórias.

[Sandro Vitenti @SandroVitenti]

@star_stufff I prefer the Clifford Algebra formulation: ∂F = J, it's compact, and since ∂ is invertible, we can solve it formally without introducing the potential.

[Sandro Vitenti @SandroVitenti]

AutoKnots addresses this by adapting the knot distribution to the function being interpolated, subject to a specified tolerance.
This reduces manual tuning and improves robustness, portability, and reproducibility of numerical pipelines.

[Sandro Vitenti @SandroVitenti]

Our paper on AutoKnots has just been published.
It presents a method for automatically selecting knots based on a user-defined interpolation error tolerance.
The algorithm is available in:
https://t.co/AkWViLSMCS
https://t.co/UrLooJSkTW
https://t.co/8yH4Wrb2H6

[Sandro Vitenti @SandroVitenti]

Spline interpolation is widely used in numerical cosmology. Tools such as CAMB, CLASS, CCL, and CLMM often require users to configure multiple parameters related to knot placement, typically through trial and error.

[Cosmo-ufes @CosmoUfes]

🌟New PhD positions!🌟 #PPGCosmo
The research topics range from theoretical to observational aspects of Astrophysics, Cosmology and Gravitation.

Send your application by 13 June 2025.
https://t.co/WIOX0CjrF3

[Sandro Vitenti @SandroVitenti]

@getjonwithit Saying “just mathematical abstractions” risks sounding dismissive. Abstractions emerge from repeated observations, they are distilled patterns, not arbitrary inventions. We can probe how dependent our theories are on imposed structures, which leads to frameworks like GR.

[NSF-DOE Rubin Observatory @VRubinObs]

Eye to the sky…on-sky engineering tests have begun at @NSF–@doescience Rubin Observatory with the world’s largest camera!

After installing & testing the LSST Camera, we turned the telescope to the sky—a moment 20 years in the making!

Rubin #CommissioningNotes are back! ✍️

🧵

[Luiz-Eduardo Del-Bem @dudelbem]

Se você quer ser cientista, entenda isso: boas oportunidades são raras. Se não souber reconhecê-las e não tiver coragem de agarrá-las, vai ser difícil chegar longe. E sim, muitos sacrifícios serão necessários. Não dá pra crescer vivendo só na zona de conforto.

[Sandro Vitenti @SandroVitenti]

@NoContextBrits They both actually speak a barbaric dialect of French with centuries of stubborn mispronunciations.

[Will Kinney @WKCosmo]

https://t.co/L86C1lI1pg