Pith Number

pith:OBFRUUQS

pith:2017:OBFRUUQSABSTO7K3PBUGQGS75D

not attested not anchored not stored refs pending

Barcodes of Towers and a Streaming Algorithm for Persistent Homology

Hannah Schreiber, Michael Kerber

arxiv:1701.02208 v2 · 2017-01-09 · math.AT · cs.CG

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OBFRUUQSABSTO7K3PBUGQGS75D}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T00:33:02.269156Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

704b1a52120065377d5b7868681a5fe8dd893320f9b8830e8c0e61a48e3020d3

Aliases

arxiv: 1701.02208 · arxiv_version: 1701.02208v2 · doi: 10.48550/arxiv.1701.02208 · pith_short_12: OBFRUUQSABST · pith_short_16: OBFRUUQSABSTO7K3 · pith_short_8: OBFRUUQS

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/OBFRUUQSABSTO7K3PBUGQGS75D \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 704b1a52120065377d5b7868681a5fe8dd893320f9b8830e8c0e61a48e3020d3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "516b881b5d961ee17b743b5dd4e90aba4578ae6a19ddff84f6fcd37c36b803b2",
    "cross_cats_sorted": [
      "cs.CG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2017-01-09T15:18:28Z",
    "title_canon_sha256": "52d5329d2492838e2fffc644f06a5cb63381db419a698229c99835f3e5ff736a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1701.02208",
    "kind": "arxiv",
    "version": 2
  }
}