Pith Number

pith:M6EWHMXB

pith:2004:M6EWHMXBMMWAVZMIWR7K3NMY4B

not attested not anchored not stored refs pending

Configuration spaces are not homotopy invariant

Paolo Salvatore, Riccardo Longoni

arxiv:math/0401075 v1 · 2004-01-08 · math.AT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{M6EWHMXBMMWAVZMIWR7K3NMY4B}

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	2026-07-04T14:38:08.993222Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

678963b2e1632c0ae588b47eadb598e079e7274ddd446d5528a7bb75385a94bb

Aliases

arxiv: math/0401075 · arxiv_version: math/0401075v1 · doi: 10.48550/arxiv.math/0401075 · pith_short_12: M6EWHMXBMMWA · pith_short_16: M6EWHMXBMMWAVZMI · pith_short_8: M6EWHMXB

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/M6EWHMXBMMWAVZMIWR7K3NMY4B \
  | 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: 678963b2e1632c0ae588b47eadb598e079e7274ddd446d5528a7bb75385a94bb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9bf548ac842878ca8733cebd2b7fcccb79ebada868b862be7c23a39bca18aa4f",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.AT",
    "submitted_at": "2004-01-08T15:31:54Z",
    "title_canon_sha256": "d0bd84c4ccdd6dd1391ce20ab6cf26057a2dc2ba37432881ffaea1426c62d6b2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0401075",
    "kind": "arxiv",
    "version": 1
  }
}