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Articles on applied mathematics, GIS and operational research

d(v)=minuN(v){d(u)+w(u,v)}d(v) = \min_{u \in N(v)} \{ d(u) + w(u,v) \}
GIS 2024-12-10 8 min read

Shortest Path in GIS Networks: Dijkstra's Algorithm

How Dijkstra's algorithm solves shortest-path problems in real geographic networks.

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minx  cTxs.t.Axb,  x0\min_{x} \; c^T x \quad \text{s.t.} \quad Ax \leq b, \; x \geq 0
Operational Research 2024-11-22 10 min read

Introduction to Linear Programming: Simplex Method

A practical introduction to LP and the Simplex method.

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Z^(s0)=i=1nλiZ(si)\hat{Z}(s_0) = \sum_{i=1}^{n} \lambda_i Z(s_i)
GIS 2024-10-15 12 min read

Spatial Interpolation: Kriging vs IDW

Comparing two fundamental spatial interpolation methods.

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mink=1Ki=0nj=0ncijxijk\min \sum_{k=1}^{K} \sum_{i=0}^{n} \sum_{j=0}^{n} c_{ij} x_{ijk}
Operational Research 2024-09-05 15 min read

Vehicle Routing Problem: Heuristic Approaches

Overview of heuristic methods for the NP-hard VRP.

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