It's a mathematical certainty. 

I don't know how many people use those but you'd have to be smart and good in mathematics and take the time to figure this out and I'd suspect many people don't realize it.

It's as mathematical certainty. 

Mathematically, it is equivalent to traditional financing. 

What are redundant mathematical calculations you carry out for each property you are considering?

Furthermore, there is no mathematical argument for waiting 27 years,  or whatever your depreciation life is.   

Mathematically speaking, bay area market is extremely niche market.

I personally like the all cash plays. sleep well concept. but mathematically leverage of course creates higher returns if EVERYTHING runs right.

I hire a college graduate in mathematics, who has a sense of humor, can pass rigorous background check, has perfect credit, and has desire to learn sales. 2. no mortgage company gives free leads3. mortgage loan officers do not get salaried, we are 100% commission.

From a mathematical standpoint, the 3 things that make RE investing so attractive is: cash flow, equity buildup & appreciation.