Abstract The composition and origin of Earth’s earliest continental crust remains enigmatic due to the absence Hadean (>4 Ga) age rocks. Here we address this question by using machine learning examine provenance 4.4–3.3 Ga Jack Hills zircons, which constitute best archive crust. Our results reveal that although some zircons may be derived from trondhjemite-tonalite-granodiorite series rocks,...


 a variant of fixed point theorem is proved in the setting of s-metric spaces

A number of experimental studies has documented that S-nitrosoglutathione (GSNO), the main endogenous low-molecular-weight S-nitrosothiol, can exert modulatory effects on inflammatory processes, thus supporting its potential employment in medicine for the treatment of important disease conditions. At molecular level, GSNO effects have been shown to modulate the activity of a series of transcrip...

background: the human t-cell lymphotropic virus type i is the first retrovirus idenfied in humans. the virus has been associated with adult t-cell leukemia/lymphoma, human t-lymphotropic virus type i, myelopathy/tropical spasc paraparesis, uveis, arthris, pulmonary lymphocyc alveolis, keratoconjuncvis sicca, and infecous dermas. human t-lymphotropic virus type iis endemic in japan, p...

in the present paper, we introduces the notion of integral type contractive mapping with respect to ordered s-metric space and prove some coupled common fixed point results of integral type contractive mapping in ordered s-metric space. moreover, we give an example to support our main result.

‎let ${x_{alpha}:alphainlambda}$ be a collection of topological spaces‎, ‎and $mathcal {g}_{alpha}$ be a grill on $x_{alpha}$ for each $alphainlambda$‎. ‎we consider tychonoffrq{}s type theorem for $x=prod_{alphainlambda}x_{alpha}$ via the above grills and a natural grill on $x$ ‎related to these grills, and present a simple proof to this theorem‎. ‎this immediately yields the classical theorem...

We analyse a recently constructed class of local solutions of type IIB supergravity that consist of a warped product of AdS3 with a sevendimensional internal space. In one duality frame the only other nonvanishing fields are the NS three-form and the dilaton. We analyse in detail how these local solutions can be extended to give infinite families of globally well-defined solutions of type IIB s...