References to topics in seqfan posts
classical combinatorics
partition (471)
set partition (21)
integer partition (15)
permutation (478)
composition (53)
arrangement (69)
transposition (6)
substitution (23)
multiset (71)
hierarchy (13)
set of sets (5)
dissection (9)
decomposition (47)
parenthesization (23)
binomial (223)
trinomial (3)
multinomial (11)
umbral (1)
choice (163)
tableau (11)
derangement (21)
rencontre (2)
menage (5)
mariage (1)
birthday (14)
pairing (1)
shuffle (9)
pigeonhole (2)
urinal (3)
urn (3)
basket (9)
box (123)
ball (56)
knot (7)
braid (1)
bead (6)
bracelet (3)
necklace (15)
wheel (17)
heap (2)
corn (95)
chaff (10)
stack (33)
chunk (13)
ladder (11)
sow (3)
yield (139)
coincidence (48)
lane (5)
peg (6)
color (102)
packing (18)
tiling (47)
quilt (8)
subsquare (1)
subtriangle (1)
hinge (3)
path (202)
trajectory (29)
behavior (73)
invariants, properties, parts and variants
distance (94)
coefficient (355)
parameter (64)
indices (121)
coordinate (216)
weight (70)
length (676)
scale (49)
ascent (24)
descent (16)
ascending (37)
descending (37)
mountain (4)
peak (13)
valley (8)
bottom (94)
top (315)
quadrant (7)
octant (6)
signature (95)
fixed point (42)
orbit (22)
conjugacy (4)
pattern (322)
forbid (20)
repetition (52)
shift (115)
labeled (45)
unordered (11)
unlabeled (27)
balanced (16)
sorted (77)
unsorted (1)
assorted (1)
flattened (1)
centered (20)
isolated (32)
aerated (2)
nested (11)
restricted (65)
staggered (2)
interpolated (1)
straight (108)
twisted (1)
skewed (6)
backward (58)
interlaced (7)
left-handed (2)
right-handed (3)
bilateral (1)
graphs, design and trees
graph (387)
design (49)
tree (124)
digraph (3)
adjacent (212)
bipartite (12)
salesman (1)
neighbour (124)
flow (26)
resistor (8)
subblock (10)
subgraph (4)
clique (8)
island (10)
diagram (27)
scheme (38)
forest (5)
cactus (1)
unrooted (6)
planted (3)
branch (35)
leaf (9)
leave (179)
father (1)
child (11)
children (14)
daughter (5)
cycle (200)
clockwise (7)
major (79)
minor (52)
discrepancy (29)
root (164)
node (130)
edge (157)
arrow (17)
diameter (10)
width (19)
breadth (3)
height (28)
vertex (55)
vertice (117)
chord (18)
crossing (24)
noncrossing (2)
overlapping (10)
avoiding (39)
self-avoiding (24)
folded (1)
persistence (7)
Combinatorial beasts
zigzag (2)
stamp (9)
collector (2)
dragon (14)
caterpillar (4)
animal (7)
circuit (18)
toothpick (56)
tower (20)
domino (19)
polyomino (62)
digits and number representation
base (450)
unary (2)
unitary (24)
binary (365)
bitwise (4)
ternary (34)
quaternary (1)
decimal (323)
hexadecimal (6)
consecutive (266)
nonconsecutive (1)
pandigital (49)
million (123)
billion (31)
trillion (16)
undecillion (8)
milliard (1)
mega (3)
giga (5)
tera (2)
peta (4)
fractions
continued fraction (80)
egyptian (24)
number properties
positive (693)
negative (243)
nonnegative (157)
absolute (196)
signed (67)
unsigned (8)
signless (1)
nonzero (101)
non-zero (68)
constant (353)
numerical (132)
precision (82)
accuracy (30)
prime and divisibility
prime (2070)
coprime (64)
semiprime (71)
factor (704)
sopf (5)
remainder (62)
quotient (24)
ratio (90)
power (707)
multiplicity (50)
occurence (4)
sieve (44)
congruent (130)
fraction (175)
halved (12)
divisor (516)
divisible (340)
divided (444)
totient (27)
cototient (6)
aliquot (31)
squarefree (77)
amicable (34)
sociable (6)
odious (28)
abundant (41)
exceeding (91)
excedance (2)
lucky (27)
deficient (13)
composite (256)
primality (56)
regular (127)
repunit (14)
emirp (22)
figurate (12)
superperfect (1)
multiperfect (8)
pseudoperfect (1)
sigma (197)
phi (64)
eulerphi (39)
golden ratio (41)
omega (29)
words and alphabets
string (182)
substring (110)
chain (66)
word (604)
subword (9)
letter (149)
symbol (140)
alphabet (83)
monoid (2)
consonant (5)
vowel (7)
frequency (26)
sentence (39)
semantic (25)
lexically (27)
lexicograph (131)
encoding (27)
reordering (23)
ascii (82)
charset (63)
prepended (14)
appended (14)
reversed (27)
prefixed (6)
palindrome (138)
padovan (9)
other greek letters
alpha (17)
delta (12)
tau (9)
gamma (57)
lambda (17)
theta (20)
zeta (49)
little sets
empty set (19)
singleton (9)
duo (5)
doubly (16)
couple (206)
triple (134)
trio (2)
triply (6)
quadruple (28)
quartett (3)
quintuplet (1)
n*n*n (29)
the various kinds
zeroes (58)
zeroth (14)
first kind (11)
secondary (8)
second kind (17)
2nd kind (1)
sixth (17)
seventh (5)
ninth (3)
tenth (8)
once (440)
twice (100)
thrice (4)
googol (4)
cardinal (15)
ordinal (5)
set operations
successor (18)
inclusion (55)
exclusion (21)
complementation (1)
cancellation (9)
intersection (90)
union (82)
concatenation (214)
juxtaposition (2)
aspects and sources
enumeration (150)
nonisomorphic (2)
classification (54)
iteration (116)
counting (286)
construction (88)
involution (21)
convolution (31)
representation (288)
interpretation (137)
illustration (45)
generalisation (4)
generalization (105)
depiction (1)
notation (168)
restriction (76)
generation (77)
span (16)
random (141)
entropy (5)
programs and algorithms
algorithm (325)
program (1597)
procedure (81)
code (616)
library (56)
programming language (32)
operating system (8)
efficient (154)
inefficient (28)
method (260)
heuristic (79)
thumb (22)
effective (49)
overflow (19)
underflow (4)
greedy (42)
register (54)
processor (10)
core (89)
switch (75)
compile (27)
backtrack (23)
prune (12)
brute force (85)
busy beaver (1)
game of life (4)
cellular (22)
punched card (6)
computation (306)
automata (277)
expressible (19)
grammar (13)
lexical (27)
geometry
segment (41)
midpoint (20)
triangle (559)
hypotenuse (12)
rectangle (68)
isocele (2)
isosceles (10)
equilateral (18)
acute (1)
obtuse (4)
pythagorean (27)
heron (1)
perimeter (12)
halving (2)
quadrilateral (2)
rhombus (12)
losange (2)
circle (64)
circular (26)
radius (5)
tangent (13)
chord (18)
spiral (23)
prism (5)
antiprism (1)
hypercube (12)
hyperplane (2)
slice (20)
manifold (1)
curve (60)
unicursal (2)
velocity (1)
interception (4)
viscos (1)
acceleration (1)
logistic (2)
semilength (5)
surface (13)
plane (85)
planar (24)
rigid (12)
volume (45)
geometric figures
dihedral (19)
tetrahedr (7)
polyedg (2)
polyhedr (6)
polygon (50)
zonotop (2)
pentagon (39)
hexagon (43)
hepta (6)
octo (176)
octa (6)
tessera (4)
gonal (22)
sphere (16)
lemniscate (1)
pyramid (2)
parabola (2)
torus (1)
ellipse (1)
cylinder (4)
growth and nature
rational (192)
polynomial (363)
exponential (108)
trigonometric (13)
hyperbolic (12)
elliptic (51)
parabolic (7)
primorial (25)
fractal (41)
transcenden (12)
irrational (40)
infinity (714)
infinitesimal (3)
surreal (1)
cyclotomic (14)
entire (187)
whole (203)
bounded (66)
compact (19)
classical functions
arcsin (32)
arccos (14)
arctan (8)
tanh (12)
cosin (5)
cosec (5)
cotan (3)
logarithm (64)
quasilog (7)
polylog (4)
hypergeometric (29)
modular (52)
formula
formula (1214)
generating function (240)
gf (38)
g.f. (169)
o.g.f. (18)
e.g.f. (23)
lgdogf (3)
lgdegf (14)
serlaplace (12)
serreverse (8)
expansion (296)
series (338)
progression (58)
telescoping (13)
WZ (3)
truncatable (45)
inversion (14)
reversion (21)
subsequence (195)
bisection (27)
quadrisection (1)
decimat (2)
Analysis
Analysis (95)
calculus (15)
analysis (95)
asymptot (155)
singular (16)
pole (8)
essential (192)
limit (347)
residue (67)
convergent (27)
proper (643)
improper (3)
definite (115)
indefinite (32)
integral (87)
integration (8)
bounded (66)
interval (98)
summation (31)
summed (19)
period (261)
monotonous (101)
nonincreasing (16)
nondecreasing (22)
aperiodic (8)
oscillating (5)
partial differential (2)
PDE (1)
ODE (5)
moment problem (2)
invariant (30)
exponent (59)
argument (94)
modulus (21)
transforms and properties
transform (228)
eigenvalue (13)
eigenvector (3)
accumulate (17)
biratio (1)
bivariat (4)
diophant (47)
formula (1214)
equation (246)
equality (51)
identity (111)
unequal (7)
inequality (37)
recurrence (472)
recursive (118)
homogeneous (14)
self-reference (3)
algebraic (63)
functional (80)
derivative (56)
lacunar (2)
denominator (105)
numerator (84)
generator (29)
relation (343)
logic and deduction
equivalence (78)
indistinguishable (24)
reciprocal (51)
if and only if (91)
necessarily (133)
sufficiently (110)
conditionally (5)
conjecture (689)
unsolved (15)
tautolog (3)
logic (64)
fuzzy (5)
multivalued (1)
trivial (360)
nontrivial (86)
definition (1243)
theorem (191)
lemma (25)
corollary (6)
consequence (33)
postulate (9)
hypothesis (48)
hypothetical (24)
principle (60)
implicit (53)
explicit (233)
conditions (111)
proposition (24)
demonstration (16)
explanation (184)
analogy (22)
verification (39)
solution (589)
confirmation (42)
conclusion (41)
experiment (94)
refutation (2)
contradiction (114)
counterexample (79)
erroneous (81)
reasoning (36)
consistency (25)
interpolation (1)
independence (5)
incomplete (45)
orientation and description
angle (19)
radian (4)
degree (174)
steradian (1)
normal (165)
vertical (68)
horizontal (60)
orthogonal (12)
perpendicular (14)
diagonal (211)
antidiagonal (63)
central (73)
maximal (88)
maximize (15)
maximum (175)
uppermost (9)
minimal (133)
minimize (38)
minimum (123)
optimal (32)
optimize (16)
optimum (6)
innermost (3)
The Encyclopedia and its board
journal (114)
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Editor in Chief (10)
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OEIS (3559)
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mathematicians and scientists
Euclid (25)
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Chess and boards
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