# Virginia Polytechnic Institute and State University Working on Covid 19 SIR Model Paper

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Mathematics

Virginia Polytechnic Institute and State University

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I dont understand this project . need help. I need the work to be detailed and the Matlab code so that I can compute ,too . thanks

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Orientability in Euclidian

Mathematics
Student’s Name
Due Date

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Chapter 1

1.1 Background Overview to Manifold (orientable and non-orientable)
A series of ‘patches’ sewn together in a ‘smooth’ manner is generally defined in a
manifold. The parametric equation is seen in each patch and the sewing’s smoothness makes no
cusps, corners, or crosses.
For instance, we look at a 1 sheet x 2+y 2−z 2=1 hyperboloid. The hyperboloid is a
revolutionary surface generated by rotating the hyperbola x 2 − z 2 = 1, which lies in the z-axis
on the (x, z)- stage. This can be configured with t — t (cosh t, 0,sinh t). The differentiable
parametry;
φ(t, θ) = (cosh t cos θ, cosh tsin θ,sinh t), −∞ < t < ∞, −∞ < θ < ∞.
can be configured to indicate the hyperboloid of the revolution(Chelnokov, Deryagina,
and Mednykh, 2017. pp.1558-1576).
We like each hyperboloid point (x, y, z) to be unique to its co-orders (t, altern) and, on
the other hand, to have each pair of co-ordinates (t, nom) allocated uniquely. The hyperbola x 2 −
z 2 = 1, y = 0, points equate to all the (t, ̄) with an æ whole integer of the 2′′s. This is not the case
when the parametrization is set to above. We can obtain one-to-one parametrizations by limiting
the mapping · to certain open subsets of R2:
φ1(t, θ) = (cosh t cos θ, cosh tsin θ,sinh t), −∞ < t < ∞, 0 < θ < 3π/2,
φ2(t, θ) = (cosh t cos θ, cosh tsin θ,sinh t), −∞ < t < ∞, π < θ < 5π/2.
The intersection of the hyperboloid with a set open in R3 should be observed as
representing each ći. The image of μ1 is the portion of the hyperboloid within the open region 0
< oral < 3 · 2 and the picture of ± 2 is the portion of the hyperboloid in the open region · < 5 μ/2

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in the cylindrical (r, ó, or z) cordon on R3. The ̈1 and ̈2 mappings are distinct, because the ̈1
and ̈2 images may be smooth surface patches.
At the heart of the general concept of a manifold are the following properties:
• Each ̈i shall be an injection map and ̈ −1 I shall be continuous, that is, ̈ −1 I shall be the
constraint on the constant map hyperboloid as specified in open set R 3. This state prevents the
surface from intersecting(Ferrández,Garay,and Lucas, 1991.pp. 48-54). • For each ̈i, vectors
“never-suspended,” “never-suspended” are linearly independent. ̈ This requirement guarantees
that the tangent plane spanned at each point on the surface is well established.
A subset S of R3 and a smooth parametrization set, the images of which cover S and
fulfill the above characteristics, are known as standard surfaces.
In two regions referring to 0 < all < μ/> and to μ < 3т/2, in this context, pictures from ·1
and ·2 are sewed together.
• The mapping ̈1 can be derived from the mapping ̈2 via a smooth coordaining exchange
in the regions where the representations of ̈1 and ̈2 overlap and ̈2 from ̈1 through smooth
coordinate exchanges. This implies that mappings φ1 and φ2 are available in the respective
accessible domains of R2, so that −θ12 and θ21 In addition, the opposite mapping is ~ twenty and •
twenty-one.
Indeed: φ2(t, θ) = φ1(t, θ) for all (t, θ) with t ∈ R and and φ2(t, θ) = φ1(t, θ − 2π) for all
(t, θ) with t ∈ R and 2π < θ < 5π/2. The corresponding smooth change of coordinates θ12 : R ×
[(π, 3π/2) ∪ (2π, 5π/2)] → R × [(π, 3π/2) ∪ (0, π/2)] is give in accordance to θ12(t, θ) = ½ (t, θ),
for t ∈ R and π < θ < 3π/2, (t, θ − 2π), for t ∈ R and 2π < θ < 5π/2.
Likewise,
θ21 : R × [(π, 3π/2) ∪ (0, π/2)] → R × [(π, 3π/2) ∪ (2π, 5π/2)]

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is given with respect to θ21(t, θ) = ½ (t, θ), for t ∈ R and π < θ < 3π/2, (t, θ + 2π), for t ∈
R and 0 < θ < π/2.
These variations in coordinates provide important surface detail. The above property is a
pillar of the concept of a mult...

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Anonymous
I was having a hard time with this subject, and this was a great help.

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