Pith Number

pith:552O7PKX

pith:2016:552O7PKXHDOPTP6Q4FHFZYMUJ6

not attested not anchored not stored refs pending

The Homology of Configuration Spaces of Trees with Loops

Daniel L\"utgehetmann, Safia Chettih

arxiv:1612.08290 v3 · 2016-12-25 · 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{552O7PKXHDOPTP6Q4FHFZYMUJ6}

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	2026-05-18T00:17:09.510252Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ef74efbd5738dcf9bfd0e14e5ce1944fa14f249fa48eba38bbfb6ad5ec8f3565

Aliases

arxiv: 1612.08290 · arxiv_version: 1612.08290v3 · doi: 10.48550/arxiv.1612.08290 · pith_short_12: 552O7PKXHDOP · pith_short_16: 552O7PKXHDOPTP6Q · pith_short_8: 552O7PKX

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/552O7PKXHDOPTP6Q4FHFZYMUJ6 \
  | 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: ef74efbd5738dcf9bfd0e14e5ce1944fa14f249fa48eba38bbfb6ad5ec8f3565

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "82965a323a613af88a7a1816a2b36bdb83d68935d67f63850a239d65ac9cfcfe",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2016-12-25T19:47:35Z",
    "title_canon_sha256": "6d1cb59a15f6460e356cb1ce674b164f2f435e33b5432591a937f52e9cc2d04d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1612.08290",
    "kind": "arxiv",
    "version": 3
  }
}