Join experts in discussing differential geometry topics. This includes manifolds, Tensors and forms. Connections and curvature also. Differential and algebraic topology discussion.
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Graduate Theory of calculating sphere centres from surface co-ordinates
- broouk
- · Replies 2 ·
Undergrad Vectors in Cartesian Cylindrical Spherical
- ha9981
- · Replies 3 ·
Graduate Is Every Arbitrary Product of Compact Spaces Compact in Any Topology?
- xaos
- · Replies 1 ·
Graduate Rotate a plane through its coefficients
- TheDestroyer
- · Replies 5 ·
Graduate Are contractible subspaces in different components homotopy equivalent?
- Bacle
- · Replies 12 ·
Graduate How to show a mapping is a diffeomorphism
- whattttt
- · Replies 2 ·
Undergrad Polygon Detection for Bay Selection and Vertical/Horizontal Line Drawing
- svishal03
- · Replies 11 ·
Graduate Finite intersection of closed sets is not necessarily closed
- CantorSet
- · Replies 2 ·
Graduate What is the Equation for Finding the Minimum Area of a Non-Euclidean Surface?
- eljose
- · Replies 9 ·
Graduate Levi-Civita proofs for divergence of curls, etc
- theuserman
- · Replies 5 ·
Graduate Minimal compactification of an infinite dimensional space
- muppet
- · Replies 7 ·
Graduate Canonical orientation on level set submanifolds?
- quasar987
- · Replies 5 ·
Graduate Jacobian matrix for Cartesian to spherical coordinates
- WannabeNewton
- · Replies 1 ·
Graduate Locating a camping spot using angles to known peaks in a photograph
- Wimpels
- · Replies 3 ·
Graduate How Do Knots in 4-Manifolds Influence Homology Classes?
- Bacle
- · Replies 5 ·
Undergrad Rotating Plane Point to xy Plane - CPtolemy
- cptolemy
- · Replies 1 ·
Graduate Locally Euclidean and Topological Manifolds
- elarson89
- · Replies 1 ·
Graduate Tychonoff theorem and Zorn's lemma
- Fernsanz
- · Replies 6 ·
Undergrad Finding lengths a and b in a fish cage geometry problem
- weedannycool
- · Replies 1 ·
Graduate Piecewise-linear ball complexes: calculations with GAP
- korepanov
- · Replies 1 ·
Where Is the Emphasis in Holonomy?
- OB1
- · Replies 2 ·
Graduate Is there a 4D compact smooth manifold with specific properties?
- lavinia
- · Replies 8 ·
Graduate Does rotating axes in 3D change the directed cosines of a fixed line?
- paragchitnis
- · Replies 2 ·
Graduate Sequences and Nets: Does (1/n) Converge to [0,1]?
- ForMyThunder
- · Replies 3 ·
Graduate Homotopy and orientation preserving
- robforsub
- · Replies 12 ·
Graduate Mapping Class Group and Path-Component of Id.
- Bacle
- · Replies 5 ·
Graduate Some questions relating topology and manifolds
- Hymne
- · Replies 3 ·
Graduate Double application of Stokes' theorem to find the area of a simplex
- norg012pp
- · Replies 2 ·
Graduate What is causing the discrepancy between the Hermite curve and the sine function?
- arpace
- · Replies 1 ·
Graduate How does non-isotopic embeddings affect the homology of manifolds and knots?
- Bacle
- · Replies 1 ·
Graduate Constructing Covering Spaces of a Sphere
- mich0144
- · Replies 15 ·
Graduate Homology cross product and orientation
- quasar987
- · Replies 0 ·
Graduate What is the Bing Metrization Theorem?
- radou
- · Replies 2 ·
Graduate Why embed into uniform metric instead of product metric in Nagata-Smirnov proof
- radou
- · Replies 11 ·
Graduate Diffeomorphisms and embedded submanifolds
- osprey
- · Replies 1 ·
Graduate Question: vector integral in non-orthog coordinates
- 7thSon
- · Replies 1 ·
High School Why do radial lines from a circle leave gaps on a larger concentric circle?
- cragar
- · Replies 14 ·
Undergrad Does |a|*b + |b|*a halve the angle between two random vectors a and b?
- Nikitin
- · Replies 10 ·
Graduate What are some examples of mixed tensors in physics?
- quasar987
- · Replies 6 ·
Graduate Lebesgue Measurability of Translated Sets?
- To0ta
- · Replies 2 ·
Graduate About coordinate transformations in general
- friend
- · Replies 43 ·
Graduate Is There a Missing Factor in the Nijenhuis Bracket Formula?
- arkajad
- · Replies 2 ·
Graduate Deriving the Lattice Growth Formula
- musicgold
- · Replies 6 ·
Graduate A compactification theorem issue
- radou
- · Replies 8 ·
Undergrad What comes after (i hat j hat k hat)
- billturner90
- · Replies 7 ·
Graduate Question regarding Munkres' proof of the Tychonoff theorem
- radou
- · Replies 13 ·
Graduate Problem from A Beautiful Mind
- Dragonfall
- · Replies 8 ·
Graduate Manipulating vector-matrices combinations
- mysearch
- · Replies 7 ·
Help with differential geometry
- vytautasr
- · Replies 10 ·
Graduate Expressing cos(2π/n) without using trigonometric functions
- Yayness
- · Replies 7 ·
Graduate 2Questions: 1)Def. of Reg. Neighhoods 2)Zero in Homlgy and Hmtpy.
- Bacle
- · Replies 3 ·
Graduate A question about the Urysohn metrization theorem
- radou
- · Replies 8 ·
Graduate How can you geometrically see the homotopy between S^n/S^m and S^n-m-1?
- mich0144
- · Replies 1 ·
Graduate Is max{μ*, ν*} an outer measure on X?
- To0ta
- · Replies 5 ·
Graduate Vectyor bundles with all zero characteristic classes
- lavinia
- · Replies 19 ·
Graduate Calculus of variations on odd dimensional manifolds
- mma
- · Replies 4 ·
Graduate Does \(\tilde{y}^{j}\) depend on \(x^{i}\) in the tangent bundle framework?
- math6
- · Replies 3 ·
Undergrad Find Slope of 1st Line w/ Given Data
- markram987
- · Replies 11 ·
Graduate Fast Computation of Fundamental Groups: Practical Methods and Tricks
- mich0144
- · Replies 7 ·
Graduate No Quadrilateral/Pentagon Knots: Simple Closed Polygons are Trivial
- Bacle
- · Replies 4 ·
Graduate Is a bundle with non-orientable fibers always trivial?
- klackity
- · Replies 7 ·
Graduate Ontoness and Induced Maps on Fundamental Group.
- Bacle
- · Replies 7 ·
Graduate Isotopy between overlapping and non-over. Dehn Twists.
- Bacle
- · Replies 1 ·
Graduate Periodic curve as immersed submanifold
- robforsub
- · Replies 3 ·
Graduate Why does a map from simply connected space to U(1) factors through R?
- eok20
- · Replies 2 ·
Graduate Spreading points evenly in plane
- shybishie
- · Replies 4 ·
Undergrad Maximising the area of a triangle of known perimeter
- Unredeemed
- · Replies 4 ·
Graduate Distance formula in hyperbolic metric
- elffry
- · Replies 2 ·
Graduate Why is the mapping class group of the torus isomorphic to GL(2,Z)?
- Bacle
- · Replies 2 ·
Undergrad Cut angles for internal struts in 2V geodesic dome
- kauaibeachbum
- · Replies 1 ·
Graduate So, the two definitions are equivalent.
- Bacle
- · Replies 6 ·
Undergrad Converting Longitude and Latitude into Meters
- Solistics
- · Replies 3 ·
Graduate Converting Rotation Matrices (Left handed to Right handed)
- neorich
- · Replies 2 ·
Graduate Maps B2->S2 Define F+ & F-: Show Int w S2 = Int F+*(w) B2 - Int F-*(w)
- huyichen
- · Replies 7 ·
Graduate Geometric Example of Torsion Cycles and Relative Cycles (in Homology)
- Bacle
- · Replies 17 ·
Graduate What is the rank of the matrix of a reimannienne metric ?
- math6
- · Replies 7 ·
Graduate Definition of a 1-forme différentiel \alpha ^{X}
- math6
- · Replies 2 ·
Graduate What is the topological characterization of the Cantor set?
- blinktx411
- · Replies 1 ·
Graduate Is every orientation form on a compact smooth manifold closed?
- robforsub
- · Replies 2 ·
Graduate Does a Compact Manifold Imply a Compact Tangent Bundle?
- math6
- · Replies 6 ·
Graduate Computing gradient in spherical coordinates with basis vectors
- autobot.d
- · Replies 2 ·
Graduate Differential Geom: Determining Partial Derivatives of f
- k312
- · Replies 5 ·
Graduate Covariant vs contravariant indices
- tickle_monste
- · Replies 7 ·
Graduate How is this possible/ what does it mean?
- Edi
- · Replies 1 ·
High School Why does the intersection of two planes form a line?
- RoughRoad
- · Replies 9 ·
Graduate How Are Maurer-Cartan Forms Utilized in Physics?
- haushofer
- · Replies 6 ·
Graduate Non degeneracy of critical points
- pp31
- · Replies 1 ·
Graduate Quotient Topology Explained: A Primer for Beginners
- shankarvn
- · Replies 6 ·
Graduate How Do Generalized Poisson Brackets Apply to Canonical Relativity?
- shoehorn
- · Replies 3 ·
Graduate Rotation of plane tangential to sphere
- Equanimity
- · Replies 2 ·
Graduate Introduction to Topology Resources
- blinktx411
- · Replies 1 ·
Graduate Lifting loops vs deck transformations on the fiber of S1×S1
- mich0144
- · Replies 8 ·
Graduate Problem in proving d(x,y)=0 implies x=y.
- AlbertEinstein
- · Replies 1 ·
Undergrad Converting longitude/latitude to x/y
- MasterX
- · Replies 5 ·
Graduate Difference between a convex norm and strong convex norme ?
- math6
- · Replies 1 ·
Graduate Distances with non-euclidean metric
- mnb96
- · Replies 1 ·
Graduate Why is a subgroup defined by vanishing functions automatically a Lie subgroup?
- hunhengy
- · Replies 4 ·
Graduate How does φ generate a Z action on R²−{0}?
- mich0144
- · Replies 12 ·
Graduate How to Determine Current Directions from an Electrical Conductivity Tensor?
- jsmith12
- · Replies 4 ·
Graduate How do we compute the geodesic between two points on a flat manifold?
- mnb96
- · Replies 7 ·