Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Counting Rocks! An Introduction to Combinatorics   This textbook, "Counting Rocks!", is the written component of an interactive
introduction to combinatorics at the undergraduate level. Throughout the text,
we link to videos where we describe the material and provide examples.
  The major topics in this text are counting problems (Chapters 1-4), proof
techniques (Chapter 5), recurrence relations and generating functions (Chapters
6-7), and an introduction to graph theory (Chapters 8-12). The material and the
problems we include are standard for an undergraduate combinatorics course.
  In addition to the linked videos, most chapters contain an investigation
section, where students are led through a series of deeper problems on a topic.
In several sections, we show students how to use the free, open source
computing software SAGE in order to solve problems. We have included many
illustrative figures throughout the text, and we end each section and chapter
with a list of exercises of varying difficulty.

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The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
1
The categories of this paper are: cs