Pith Number

pith:6SIYMX6G

pith:2013:6SIYMX6GICE5MM5O5TPJUOF5SE

not attested not anchored not stored refs pending

Poincare duality in Morava K-theory for classifying spaces of orbifolds

Man Chuen Cheng

arxiv:1305.2731 v1 · 2013-05-13 · 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{6SIYMX6GICE5MM5O5TPJUOF5SE}

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	2026-05-18T03:25:47.510699Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f491865fc64089d633aeecde9a38bd911b5f22918268b9d7d0552a44b759c1ac

Aliases

arxiv: 1305.2731 · arxiv_version: 1305.2731v1 · doi: 10.48550/arxiv.1305.2731 · pith_short_12: 6SIYMX6GICE5 · pith_short_16: 6SIYMX6GICE5MM5O · pith_short_8: 6SIYMX6G

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/6SIYMX6GICE5MM5O5TPJUOF5SE \
  | 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: f491865fc64089d633aeecde9a38bd911b5f22918268b9d7d0552a44b759c1ac

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "21d764ce6c7b06cc50771e0cdcf5c449db800b7243f824e0763bc6c4232520b1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2013-05-13T10:38:51Z",
    "title_canon_sha256": "047b39e2f3424bc5981fde0ee496cd2aac9d9418fb20d0a5f8e4b60905b7607d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.2731",
    "kind": "arxiv",
    "version": 1
  }
}