Pith Number

pith:PIY4UCDW

pith:2013:PIY4UCDW35RF56JJHUEEPGZHUA

not attested not anchored not stored refs pending

Spectral Sequences, Exact Couples and Persistent Homology of filtrations

Laxmi Parida, Saugata Basu

arxiv:1308.0801 v7 · 2013-08-04 · 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{PIY4UCDW35RF56JJHUEEPGZHUA}

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	2026-05-17T23:58:08.929393Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7a31ca0876df625ef9293d08479b27a020130f4ff120287363890f255e918008

Aliases

arxiv: 1308.0801 · arxiv_version: 1308.0801v7 · doi: 10.48550/arxiv.1308.0801 · pith_short_12: PIY4UCDW35RF · pith_short_16: PIY4UCDW35RF56JJ · pith_short_8: PIY4UCDW

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/PIY4UCDW35RF56JJHUEEPGZHUA \
  | 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: 7a31ca0876df625ef9293d08479b27a020130f4ff120287363890f255e918008

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e97c77892940780bbb0faca42a4064323557102d4dac2f8eb2d5193590da0cbf",
    "cross_cats_sorted": [
      "cs.CG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2013-08-04T12:19:45Z",
    "title_canon_sha256": "44d83f7f29a2772235da1f8155c4d0ba22ba642b13c024d1e741c0c6b357b1ef"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1308.0801",
    "kind": "arxiv",
    "version": 7
  }
}