is an empty set a subset of every set

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
is an empty set a subset of every set	1.93	0.5	7498	11	37
is	0.05	0.9	8275	40	2
an	1.51	0.2	7160	24	2
empty	1.8	0.5	2083	20	5
set	0.4	0.6	9974	42	3
a	0.92	1	6519	100	1
subset	1.73	0.4	2444	81	6
of	0.89	0.3	6229	48	2
every	1.25	0.4	1025	98	5
set	1.76	0.3	3092	62	3

Keyword	CPC	PCC	Volume	Score
is an empty set a subset of every set	1.24	1	3623	82
why is the empty set a subset of every set	1.68	0.8	1564	11
empty set is a proper subset of every set	1.56	0.1	5997	78
prove that empty set is a subset of every set	0.44	0.9	465	33
is empty set subset of empty set	0.34	0.7	2820	23
is empty set a proper subset	0.28	0.8	9659	4
subset of empty set	0.97	0.6	8068	26
empty set subset of all sets	1.13	0.3	5891	42
is the empty set in every set	0.23	0.9	8308	17
number of subsets of an empty set	1.75	0.1	1768	91
does every set contain the empty set	0.98	0.4	1293	52
can a subset be empty	0.63	0.2	9159	21
do empty sets have no subsets	1.83	0.9	8017	6
does the empty set contain itself	0.73	0.1	5590	31