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      "title": "Lars Hörmander, Fourier integral operators. I, Acta Mathematica 127 (1971), 79–183",
      "url": "https://projecteuclid.org/journals/acta-mathematica/volume-127/issue-none/Fourier-integral-operators-I/10.1007/BF02392052.pdf",
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    "The unadopted external converse is replaced by a complete shrinking-packet calculation with uniform O(R^-1/2) error.",
    "A uniformly positive finite matrix factor is constructed with all ordinary symbol derivatives; finite chart assembly proves the manifold upper bound.",
    "The canonical graph density normalization is computed through the exact matching sequence, giving the intrinsic norm square.",
    "Relative-frequency branches are separated by a logarithmic-ratio Fourier filter whose compactness preservation and full symbol action are proved.",
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