prepare release

3 files changed, 11 insertions, 11 deletions

diff --git a/README.md b/README.md
index 51029bf..990aa7d 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # Ripser
 
-Copyright © 2015–2019 [Ulrich Bauer].
+Copyright © 2015–2021 [Ulrich Bauer].
 
 
 ### Description
@@ -39,7 +39,7 @@ Ripser's efficiency is based on a few important concepts and principles, buildin
 
 
 ### Version
-[Latest release][latest-release]: 1.1 (August 2019)
+[Latest release][latest-release]: 1.2 (February 2021)
 
 
 ### Building
@@ -61,12 +61,12 @@ Ripser supports several compile-time options. They are switched on by defining t
   - `USE_COEFFICIENTS`: enable support for coefficients in a prime field
   - `INDICATE_PROGRESS`: indicate the current progress in the console
   - `PRINT_PERSISTENCE_PAIRS`: output the computed persistence pairs (enabled by default in the code; comment out to disable)
-  - `USE_GOOGLE_HASHMAP`: enable support for Google's [sparsehash] data structure; may further reduce memory footprint
+  - `USE_ROBINHOOD_HASHMAP`: enable support for Martin Ankerl's [robinhoodhash] data structure; may further reduce memory footprint
 
-For example, to build Ripser with support for Google's hashmap:
+For example, to build Ripser with support for Martin Ankerl's robin hood hashmap:
 
 ```sh
-$ c++ -std=c++11 ripser.cpp -o ripser -Ofast -D NDEBUG -D USE_GOOGLE_HASHMAP
+$ c++ -std=c++11 ripser.cpp -o ripser -O3 -D NDEBUG -D USE_ROBINHOOD_HASHMAP
 ```
 
 A Makefile is provided with some variants of the above options. Use `make all` to build them. The default `make` builds a binary with the default options.
@@ -79,7 +79,7 @@ The input is given either in a file whose name is passed as an argument, or thro
     - `distance`: full distance matrix; similar to the above, but for all entries of the distance matrix. One line per row of the matrix; only the part below the diagonal is actually read.
     - `dipha`: DIPHA distance matrix as described on the [DIPHA] website.
     - `point-cloud`: point cloud; a comma (or whitespace, or other non-numerical character) separated list of coordinates of the points in some Euclidean space, one point per line.
-    - `binary`: lower distance matrix in binary file format; a sequence of the distance matrix entries below the diagonal in 32 bit double format (IEEE 754, little endian).
+    - `binary`: lower distance matrix in binary file format; a sequence of the distance matrix entries below the diagonal in 32 bit float format (IEEE 754, single, little endian).
     - `sparse`: sparse triplet format; a whitespace separated list of entries of a sparse distance matrix, one entry per line, each of the form *i j d(i,j)* specifying the distance between points *i* and *j*.  Each pair of points should appear in the file at most once.
   - `--dim k`: compute persistent homology up to dimension *k*.
   - `--threshold t`: compute Rips complexes up to diameter *t*.
@@ -105,9 +105,9 @@ If you use Ripser in your research or if you want to give a reference to Ripser
 @misc{1908.02518,
 	Author = {Ulrich Bauer},
 	Title = {Ripser: efficient computation of Vietoris-Rips persistence barcodes},
-	Month = Aug,
-	Year = {2019},
-	Eprint = {1908.02518},
+	Month = Feb,
+	Year = {2021},
+	Eprint = {1908.02518v2},
 	Note = {Preprint}
 }
 ```
@@ -127,5 +127,5 @@ Ripser is licensed under the [MIT] license (`COPYING.txt`), with an extra clause
 [PHAT]: <http://git.io/dipha>
 [Perseus]: <http://www.sas.upenn.edu/~vnanda/perseus/>
 [GUDHI]: <http://gudhi.gforge.inria.fr>
-[sparsehash]: <https://github.com/sparsehash/sparsehash>
+[robinhoodhash]: <https://github.com/martinus/robin-hood-hashing>
 [MIT]: <https://opensource.org/licenses/mit-license.php>
\ No newline at end of file
diff --git a/ripser.cpp b/ripser.cpp
index 84da277..c1790a7 100644
--- a/ripser.cpp
+++ b/ripser.cpp
@@ -4,7 +4,7 @@
 
  MIT License
 
- Copyright (c) 2015–2019 Ulrich Bauer
+ Copyright (c) 2015–2021 Ulrich Bauer
 
  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
diff --git a/robin-hood-hashing b/robin-hood-hashing
-Subproject 4869243035a2732fdb96407db234bdc7a3a985c
+Subproject 7b00237399cec62ee5795f9013cf5df8de596e6