Name for this property closely related to subadditivity












1














A subadditive function is a function $f : A rightarrow B$ with the following property :
$$ forall x, y in A,~~~~~f(x+y) leq f(x) + f(y),$$
where both $A$ and $B$ are closed under addition.



I'm wondering if there is a name for the following closely related property :
$$ exists M > 0, forall x, y in A,~~~~~ f(x+y) leq MBig(f(x) + f(y)Big).$$










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  • 2




    This paper seems to discuss even more general versions of subadditivity.
    – MisterRiemann
    Dec 3 '18 at 20:13












  • @MisterRiemann Very many thanks.
    – M.G
    Dec 3 '18 at 20:14










  • Once I asked a question on terminology and I was told "What is wrong with coinage". Well, nothing, but I suffer from the impostor's syndrome and I would rather let coinage to native english speakers.
    – M.G
    Dec 3 '18 at 20:16








  • 3




    While I agree with you on that one, I also agree with Gauss, who famously said: "What we need are notions, not notations". So as long as everyone can understand the notions that you talk about, you should not worry too much about the notation, i.e. terminology in this case.
    – MisterRiemann
    Dec 3 '18 at 20:22
















1














A subadditive function is a function $f : A rightarrow B$ with the following property :
$$ forall x, y in A,~~~~~f(x+y) leq f(x) + f(y),$$
where both $A$ and $B$ are closed under addition.



I'm wondering if there is a name for the following closely related property :
$$ exists M > 0, forall x, y in A,~~~~~ f(x+y) leq MBig(f(x) + f(y)Big).$$










share|cite|improve this question




















  • 2




    This paper seems to discuss even more general versions of subadditivity.
    – MisterRiemann
    Dec 3 '18 at 20:13












  • @MisterRiemann Very many thanks.
    – M.G
    Dec 3 '18 at 20:14










  • Once I asked a question on terminology and I was told "What is wrong with coinage". Well, nothing, but I suffer from the impostor's syndrome and I would rather let coinage to native english speakers.
    – M.G
    Dec 3 '18 at 20:16








  • 3




    While I agree with you on that one, I also agree with Gauss, who famously said: "What we need are notions, not notations". So as long as everyone can understand the notions that you talk about, you should not worry too much about the notation, i.e. terminology in this case.
    – MisterRiemann
    Dec 3 '18 at 20:22














1












1








1







A subadditive function is a function $f : A rightarrow B$ with the following property :
$$ forall x, y in A,~~~~~f(x+y) leq f(x) + f(y),$$
where both $A$ and $B$ are closed under addition.



I'm wondering if there is a name for the following closely related property :
$$ exists M > 0, forall x, y in A,~~~~~ f(x+y) leq MBig(f(x) + f(y)Big).$$










share|cite|improve this question















A subadditive function is a function $f : A rightarrow B$ with the following property :
$$ forall x, y in A,~~~~~f(x+y) leq f(x) + f(y),$$
where both $A$ and $B$ are closed under addition.



I'm wondering if there is a name for the following closely related property :
$$ exists M > 0, forall x, y in A,~~~~~ f(x+y) leq MBig(f(x) + f(y)Big).$$







real-analysis reference-request terminology






share|cite|improve this question















share|cite|improve this question













share|cite|improve this question




share|cite|improve this question








edited Dec 3 '18 at 20:11

























asked Dec 3 '18 at 20:04









M.G

2,2131134




2,2131134








  • 2




    This paper seems to discuss even more general versions of subadditivity.
    – MisterRiemann
    Dec 3 '18 at 20:13












  • @MisterRiemann Very many thanks.
    – M.G
    Dec 3 '18 at 20:14










  • Once I asked a question on terminology and I was told "What is wrong with coinage". Well, nothing, but I suffer from the impostor's syndrome and I would rather let coinage to native english speakers.
    – M.G
    Dec 3 '18 at 20:16








  • 3




    While I agree with you on that one, I also agree with Gauss, who famously said: "What we need are notions, not notations". So as long as everyone can understand the notions that you talk about, you should not worry too much about the notation, i.e. terminology in this case.
    – MisterRiemann
    Dec 3 '18 at 20:22














  • 2




    This paper seems to discuss even more general versions of subadditivity.
    – MisterRiemann
    Dec 3 '18 at 20:13












  • @MisterRiemann Very many thanks.
    – M.G
    Dec 3 '18 at 20:14










  • Once I asked a question on terminology and I was told "What is wrong with coinage". Well, nothing, but I suffer from the impostor's syndrome and I would rather let coinage to native english speakers.
    – M.G
    Dec 3 '18 at 20:16








  • 3




    While I agree with you on that one, I also agree with Gauss, who famously said: "What we need are notions, not notations". So as long as everyone can understand the notions that you talk about, you should not worry too much about the notation, i.e. terminology in this case.
    – MisterRiemann
    Dec 3 '18 at 20:22








2




2




This paper seems to discuss even more general versions of subadditivity.
– MisterRiemann
Dec 3 '18 at 20:13






This paper seems to discuss even more general versions of subadditivity.
– MisterRiemann
Dec 3 '18 at 20:13














@MisterRiemann Very many thanks.
– M.G
Dec 3 '18 at 20:14




@MisterRiemann Very many thanks.
– M.G
Dec 3 '18 at 20:14












Once I asked a question on terminology and I was told "What is wrong with coinage". Well, nothing, but I suffer from the impostor's syndrome and I would rather let coinage to native english speakers.
– M.G
Dec 3 '18 at 20:16






Once I asked a question on terminology and I was told "What is wrong with coinage". Well, nothing, but I suffer from the impostor's syndrome and I would rather let coinage to native english speakers.
– M.G
Dec 3 '18 at 20:16






3




3




While I agree with you on that one, I also agree with Gauss, who famously said: "What we need are notions, not notations". So as long as everyone can understand the notions that you talk about, you should not worry too much about the notation, i.e. terminology in this case.
– MisterRiemann
Dec 3 '18 at 20:22




While I agree with you on that one, I also agree with Gauss, who famously said: "What we need are notions, not notations". So as long as everyone can understand the notions that you talk about, you should not worry too much about the notation, i.e. terminology in this case.
– MisterRiemann
Dec 3 '18 at 20:22










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