Metrics...

[DaveReading]

There are, because F(0) and F(1) have to be defined to start the sequence. It is just usually chosen as F(0) = 0 and F(1) = 1

You would have to argue with Leonardo Bonacci - they're his numbers and he makes the rules.

Unfortunately you're nearly 800 years too late to try.

 

[Dogtrousers]

Something for you to try and answer. Are there an infinite number of Fibonacci primes?

My first response was would be "I don't have a clue"

After a bit of googling it seems that this is in fact a very deep and wise response.

 

[Ming the Merciless]

Then you have lakh which is 100,000

 

[Dogtrousers]

You would have to argue with Leonardo Bonacci - they're his numbers and he makes the rules.

Unfortunately you're nearly 800 years too late to try.

Interesting fact: The name "Fibonacci" was made up several hundred years after his death*. People just called him Leonardo, or possibly just Leo, or Len during his life. I like the idea of him being a Len.

* I can't remember when and by whom.

 

[Dogtrousers]

Q: Who was the smallest man on the moon?
A: Neil Angstrom

 

[Ming the Merciless]

Interesting fact: The name "Fibonacci" was made up several hundred years after his death*. People just called him Leonardo, or possibly just Leo, or Len during his life. I like the idea of him being a Len.

* I can't remember when and by whom.

Have a delve into Lucas prime sequence

 

[Ming the Merciless]

You can use the same algorithm but with different starting pairs, but these have different names according to the OEIS. eg if you start with 2,1 you get. the "Lucas Numbers"

Every Lucas number can be stated as the sum of two Fibonacci numbers.

 

[Ming the Merciless]

Q: Who was the smallest man on the moon?
A: Neil Angstrom

Where is the groan emoji 😩

 

[BrumJim]

Fibonacci numbers normally start 1,1 I (like you) thought that was the definition of the F numbers and the Online Encyclopedia of Integer Sequences agrees with us.
https://oeis.org/A000045

You can use the same algorithm but with different starting pairs, but these have different names according to the OEIS. eg if you start with 2,1 you get. the "Lucas Numbers"

https://oeis.org/A000032

So, in short, according to the OEIS there is only one sequence called "Fibonacci Numbers" and it starts 1,1

If you disagree, take it up with this guy: https://en.wikipedia.org/wiki/Neil_Sloane

My father would have had a very different understanding of "Lucas Numbers" having worked for them a number of years ago. As in "numbers that need 'clarifying' before being accepted".

 

[Dogtrousers]

My father would have had a very different understanding of "Lucas Numbers" having worked for them a number of years ago. As in "numbers that need 'clarifying' before being accepted".

My best mate at school's dad worked for Lucas. It was great visiting their house. It was not unusual for there to be a motorbike in bits in the living room.

 

[Bristolian]

My post was tongue in cheek reference inflating figures - and either way; I’m pretty good at head mathematics and converting both ways.

Funnily enough: both Mild Steel and Non Ferrous production is my game too. And I’m buying materials in metric and imperial every week. These days it’s usually American made stuff, specialist stuff or Aluminium that’s bought in imperial sizes. Standard Mild, Stainless steel and ‘everything else’ that’ is metric.

We’re not into offshore / nuclear etc - so the differences between 19mm and 3/4” for example rarely cause problems. Infact I’m not sure I’ve ever been caught out. Yet !

The company I worked for made measurement systems (thickness, width, length, thickness profile, coating thickness/weight, temperature, speed) for rolling mills producing flat products in any metal. I was there from 1980 to 1998 and the only imperial systems we made were for American mills where they often wanted the gauges set up in "mils" which we would call "thou" - 1/1000 inch.

We had a French sister company that made x-ray systems for detecting defects in welds at nuclear power stations but I was never involved with those.

Interesting days and it's the only job I have ever regretted leaving

 

[Bristolian]

Wot - 10km is about 6 miles?

I perhaps should have added an or 🤔 emoji after my comment about my hear hurting.

 

[Sharky]

One of my first holidays, in Spain and I tried to order a beer at the bar. My Spanish was terrible, but eventually, I think the bar man understood.

Then he asked "do you want it in a pint glass"!