52C10 Erdős problems and related topics of discrete geometry [See also <a href="#code:11Hxx">11Hxx</a>]

52C15 Packing and covering in $2$ dimensions [See also <a href="#code:05B40">05B40</a>, <a href="#code:11H31">11H31</a>]

52C17 Packing and covering in $n$ dimensions [See also <a href="#code:05B40">05B40</a>, <a href="#code:11H31">11H31</a>]

52C20 Tilings in $2$ dimensions [See also <a href="#code:05B45">05B45</a>, <a href="#code:51M20">51M20</a>]

52C22 Tilings in $n$ dimensions [See also <a href="#code:05B45">05B45</a>, <a href="#code:51M20">51M20</a>]

52C25 Rigidity and flexibility of structures [See also <a href="#code:70B15">70B15</a>]

52C26 Circle packings and discrete conformal geometry

52C30 Planar arrangements of lines and pseudolines

52C35 Arrangements of points, flats, hyperplanes [See also <a href="#code:32S22">32S22</a>]

52C45 Combinatorial complexity of geometric structures [See also <a href="#code:68U05">68U05</a>]

52C99 None of the above, but in this section

53-XX Differential geometry {For differential topology, see <a href="#code:57Rxx">57Rxx</a>. For foundational questions of differentiable manifolds, see <a href="#code:58Axx">58Axx</a>}

53-00 General reference works (handbooks, dictionaries, bibliographies, etc.)

53-01 Instructional exposition (textbooks, tutorial papers, etc.)

53-02 Research exposition (monographs, survey articles)

53-03 Historical (must also be assigned at least one classification number from Section 01)

53-04 Explicit machine computation and programs (not the theory of computation or programming)

53-06 Proceedings, conferences, collections, etc.

53A07 Higher-dimensional and -codimensional surfaces in Euclidean $n$-space

53A10 Minimal surfaces, surfaces with prescribed mean curvature [See also <a href="#code:49Q05">49Q05</a>, <a href="#code:49Q10">49Q10</a>, <a href="#code:53C42">53C42</a>]

53A40 Other special differential geometries

53A55 Differential invariants (local theory), geometric objects

53A60 Geometry of webs [See also <a href="#code:14C21">14C21</a>, <a href="#code:20N05">20N05</a>]