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Category: Journal of Geometry and Physics

On Hopf hypersurfaces of <math xmlns:mml=”http://www.w3.org/1998/Math/MathML” altimg=”si1.svg” class=”math”><msup><mrow><mi mathvariant=”double-struck”>S</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>×</mo><msup><mrow><mi mathvariant=”double-struck”>S</mi></mrow><mrow><mn>2</mn></mrow></msup></math> and <math xmlns:mml=”http://www.w3.org/1998/Math/MathML” altimg=”si2.svg” class=”math”><msup><mrow><mi mathvariant=”double-struck”>H</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>×</mo><msup><mrow><mi mathvariant=”double-struck”>H</mi></mrow><mrow><mn>2</mn></mrow></msup></math>

On Hopf hypersurfaces of <math xmlns:mml=”http://www.w3.org/1998/Math/MathML” altimg=”si1.svg” class=”math”><msup><mrow><mi mathvariant=”double-struck”>S</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>×</mo><msup><mrow><mi mathvariant=”double-struck”>S</mi></mrow><mrow><mn>2</mn></mrow></msup></math> and <math xmlns:mml=”http://www.w3.org/1998/Math/MathML” altimg=”si2.svg” class=”math”><msup><mrow><mi mathvariant=”double-struck”>H</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>×</mo><msup><mrow><mi mathvariant=”double-struck”>H</mi></mrow><mrow><mn>2</mn></mrow></msup></math>

Publication date: Available online 15 September 2023Source: Journal of Geometry and PhysicsAuthor(s): Xi Zhang, Dong Gao, Zejun Hu, Zeke Yao

Investigation of space-times through <em>W</em><sub>2</sub>-curvature tensor in <math xmlns:mml=”http://www.w3.org/1998/Math/MathML” altimg=”si1.svg” class=”math”><mi>f</mi><mrow><mo stretchy=”true”>(</mo><mi>R</mi><mo>,</mo><mi mathvariant=”script”>G</mi><mo stretchy=”true”>)</mo></mrow></math> gravity

Investigation of space-times through <em>W</em><sub>2</sub>-curvature tensor in <math xmlns:mml=”http://www.w3.org/1998/Math/MathML” altimg=”si1.svg” class=”math”><mi>f</mi><mrow><mo stretchy=”true”>(</mo><mi>R</mi><mo>,</mo><mi mathvariant=”script”>G</mi><mo stretchy=”true”>)</mo></mrow></math> gravity

Publication date: Available online 9 September 2023Source: Journal of Geometry and PhysicsAuthor(s): Nasser Bin Turki, Uday Chand De, Abdallah Abdelhameed Syied, Gabriel-Eduard Vîlcu