Related articles:
Geodesic
Functional analysis
Key terms:
dx
varphi
nabla
dy
cdot
iint
vanishes
minimizing
satisfy
derivatives
nabla u
hbox
eigenvalue
endpoints
calculus of variations
courant
partial l
partial f
jost
extremal
fomin
variational problem
supremum
extremum
boundary conditions
epsilon f
epsilon v
gelfand
nabla v
optical length
trial functions
depends upon
wave equation
lambda r u
boundary value
minimizing function
interscience
weak extrema
eigenvalue problems
will be denoted
natural boundary
refractive index
regularity theory
differentiable function
partial differential equation
two continuous derivatives
function that minimizes
vanishes at the endpoints
endpoints of the interval
after integration by parts
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